ICTP - Scientific Calendar

PLEASE NOTE: Due to ongoing concerns about the COVID-19 virus, ICTP conferences, schools and workshops are cancelled until mid-June 2020. Please note that some of the activities that have been cancelled this year will, in fact, be postponed until next year. The decision on which activities are to be postponed will be made after the COVID-19 emergency has passed. Please check ICTP's Scientific Calendar frequently for updates.

Each year, ICTP organizes more than 60 international conferences, workshops, and numerous seminars and colloquia.

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External organizations can pay for and organize their own high-level scientific and cultural events at ICTP. Details for these "Hosted Activities" are available in the Logistic Guidelines for Hosted Activities (pdf download).
Travel fellowships for ICTP conferences and workshops are available.
Download a pdf of the 2020 Scientific Calendar.

Showing 317 records

Europe/Rome The Abdus Salam International Centre for Theoretical Physics (ICTP) and the Board of Research in Nuclear Sciences, Department of Atomic Energy, India, in collaboration with the Goa University, National Physical Laboratory, Council of Scientific and Industrial Research, India and the Indian Institute of Atrophysics are organizing a Conference on Research Frontiers in Ultra-Cold Atomic and Molecular Gases to be held at Goa University, Goa, India, from 10 to 14 January 2011. MAIN TOPICS: QUANTUM PHASE TRANSITIONS IN ULTRA-COLD GASES IN OPTICAL LATTICES MIXTURES OF BOSONIC AND FERMIONIC ATOMS IN TRAPS AND OPTICAL LATTICES COLD MOLECULES QUANTUM INFORMATION USING ULTRA-COLD ATOMS AND MOLECULES PRECISION MEASUREMENRS WITH ULTRA-COLD GASES Conference Venue: International Center, Goa, Goa University Road, Dona Paula Post, Dona Paula, Goa, 403 004, India Goa - India ICTP pio@ictp.it

Activity

10 Jan 2011 - 14 Jan 2011

@ Goa - India

Condensed Matter and Statistical Physics

Conference on Research Frontiers in Ultra-Cold Atomic and Molecular Gases | (smr 2274)

Organizer(s): Directors: B. Das, B.N. Jagatap, M.N. Kiselev, G. Shlyapnikov.Local: R.V. Pai, K.R. Priolkar, J.A.E. Desa, P.R. Sarode, D.N. Deobagkar

Secretary: K. Mabilo

Support E-Mail: smr2274@ictp.it

Conference Venue: International Center, Goa, Goa University Road, Dona Paula Post, Dona Paula, Goa, 403 004, India

Seminar

11 Jan 2011

@ ICTP

High Energy Cosmology and Astroparticle Physics , Relativity Cosmology and Astrophysics

Minimal Flavor Violation and the Seesaw

Address: Strada Costiera, 11 I - 34151 Trieste (Italy)

Room: Leonardo da Vinci Building Luigi Stasi Seminar Room

Speaker(s): Daniel HERNANDEZ DIAZ (ICTP)

Seminar Start Time: 16:30

Activity

13 Jan 2011 - 15 Jan 2011

@ Trieste - Italy

Condensed Matter and Statistical Physics

15th International Workshop on Computational Physics and Materials Science: Total Energy and Force Methods | (smr 2220)

Room: Leonardo da Vinci Building Main Lecture Hall

Organizer(s): Directors: Lucia Reining, Ivo Souza, Stefano Fabris; R. Gebauer (Local Organiser)

Secretary: S. Fairclough

Support E-Mail: smr2220@ictp.it

Hosted Activity

15 Jan 2011 - 17 Jan 2011

@ Trieste - Italy

SIS-Sida Carbon Footprint pre-seminar for MENA and EAC | (smr H274)

Room: Adriatico Guest House Lundqvist Lecture Hall

Organizer(s): SIS (Swedish Standards Institute), Dr. Mats Soederlund; local organizer: D. Pernigotti

Secretary: M. Soederlund

Europe/Rome A Hands-on Tutorial on Electronic Structure Computations will be organized in the week following the 15th International Workshop on Computational Physics and Materials Science: Total Energy and Force Methods, January 17-21, 2011. Advanced topics like electronic transport, excitations (TDDFT and GW) and NRM computations will be treated. Students and young postdocs with a proven experience in standard DFT computations may participate in this tutorial. The Tutorial is open only for participants of the Workshop. Trieste - Italy ICTP pio@ictp.it

Activity

17 Jan 2011 - 21 Jan 2011

@ Trieste - Italy

Condensed Matter and Statistical Physics

Hands-on Tutorial on Electronic Structure Computations | (smr 2221)

Room: Adriatico Guest House Informatics Lab.

Organizer(s): Directors: Shobhana Narasimhan, R. Gebauer Local Organiser: R. Gebauer

Laboratories: AGH (Infolab. and Eklund Labs.)

Secretary: S. Fairclough

Support E-Mail: smr2221@ictp.it

Hosted Activity

17 Jan 2011 - 21 Jan 2011

@ Trieste - Italy

"ISO/TC 207/SC 7/WG 2 - GHG management in the value or supply chain" | (smr H272)

Organizer(s): Local organizer: F. Giorgi

Secretary: Ms. Claudia Rose

Europe/Rome Some spectral properties of products of random matrices are discussed. In particular, exact analytic expression related to the eigenvalue and singular value distributions for the product of an arbitrary number of independent rectangular Gaussian random matrices are derived in the limit of large matrix dimensions. The eigenvalue density is obtained by means of a planar diagrammatic technique, which will be outlined in great detail throughout the talk, while the singular value density is derived in the framework of Free Probability, the extension of ordinary probability theory to non-commuting objects. Both distributions are shown to display a power-law behavior at zero. A heuristic form for finite size corrections to these expressions which very well approximates the distributions for matrices of finite dimensions is proposed. All results are compared to empirical spectra, finding an excellent overall agreement between theory and data. Also, some possible applications to information theory and to problems of multivariate statistics are discussed. ICTP ICTP pio@ictp.it

Seminar

18 Jan 2011

@ ICTP

Condensed Matter and Statistical Physics

Joint ICTP/SISSA Statistical Physics seminar: "Spectra of products of Gaussian random matrices"

Address: Strada Costiera, 11 I - 34151 Trieste (Italy)

Room: Leonardo da Vinci Building Luigi Stasi Seminar Room

Speaker(s): Giacomo LIVAN (Universita' di Pavia)

Seminar Start Time: 11:30

Activity

20 Jan 2011 - 21 Jan 2011

@ Trieste - Italy

Experts' Meeting on "New online resources to foster Physics and Mathematics education in the developing world" | (smr 2314)

Organizer(s): Science Dissemination Unit, ICTP

Secretary: N. Dabrowska

Support E-Mail: sdu@ictp.it

Europe/Rome This is the continuation of the seminars of the Applied Physics Scientific Section. You will be especially welcome if you are visiting the Centre, or another Trieste Institute, as Associate Members, TRIL Fellows, or if you are from Affiliated Institutes in the various areas of Applied Physics. The summary of the seminar will be available at: http://www.ictp.it/~chelaf/ss273.html Refreshments will be served at the end of this event. ICTP ICTP pio@ictp.it

Seminar

20 Jan 2011

@ ICTP

Applied Physics

Measurement of stimulated Hawking emission in an analogue system

Address: Strada Costiera, 11 I - 34151 Trieste (Italy)

Room: Leonardo da Vinci Building Oppenheimer Meeting Room

Speaker(s): Silke Weinfurtner (SISSA, Trieste)

Support E-Mail: chelaf@ictp.it

Seminar Start Time: 15:30

Activity

24 Jan 2011 - 28 Jan 2011

@ Trieste - Italy

Applied Physics

Preparatory School to the Winter College on Optics in Imaging Science | (smr 2222)

Room: Leonardo da Vinci Building Euler Lecture Hall

Organizer(s): Directors: William T. Rhodes, J.Ojeda-Castañeda, Gianluca Valentini Local Organisers: J. Niemela (ICTP), M. Danailov (Elettra)

Laboratories: AGH (Infolab. and Eklund Lab.)

Secretary: A. Lusenti

Cosponsor(s): Co-sponsored by: the International Commission for Optics (ICO), the Optical Society of America (OSA), the International Society for Optics and Photonics (SPIE), the European Optical Society (EOS), the Societa' Italiana di Ottica e Fotonica (SIOF), the US National Academy of Science (NAS), the Photonics Society (IEEE) and the Central European Initiative (CEI)

Support E-Mail: smr2222@ictp.it

Europe/Rome We show that the chiral correlators of the SU(2) level k WZW model can be used as ground states of quantum spin chains. Employing the null vectors of this Rational CFT, we construct the corresponding Hamiltonians. At level k=1 we recover the Haldane-Shastry spin chain which is generalized to study dimerized and random chains. At level k=2 we construct a spin 1 chain whose ground state is a pfaffian, and a spin 1/2 chain whose ground state is degenerate, according to the fusion rules of the WZW. These models are further generalized to two dimensions. We shall also briefly discuss the relation with the Fractional Quantum Hall wave functions allowing for topological quantum computation. SISSA, Santorio Bldg., Room 129 1st floor ICTP pio@ictp.it

Seminar

25 Jan 2011

@ SISSA, Santorio Bldg., Room 129 1st floor

Condensed Matter and Statistical Physics

Joint ICTP/SISSA Statistical Physics seminar: "Quantum spin Hamiltonian for the SU(2) Wess-Zumino-Witten model"

Speaker(s): German SIERRA (Consejo Superior de Investigaciones Cientificas, Madrid)

Seminar Start Time: 11:00

Seminar

25 Jan 2011

@ ICTP

High Energy Cosmology and Astroparticle Physics , Phenomenology of Particle Physics

Gravitino dark matter at the LHC

Address: Strada Costiera, 11 I - 34151 Trieste (Italy)

Room: Leonardo da Vinci Building Luigi Stasi Seminar Room

Speaker(s): Laura COVI (University of Gottingen, Germany)

Seminar Start Time: 16:30

Europe/Rome We will be concerned with the critical points of the oriented volume and Coulomb potential on configuration spaces of mechanical linkages. The case of a planar polygonal linkage will be considered in some detail. It will be shown that the critical points of the oriented area are given by the cyclic configurations and the critical values can be calculated using formulae of Heron-Brahmagupta type. Similar issues will be addressed in the case of Coulomb potential. Possible generalizations of these results for tensegrity linkages will be also outlined. ICTP ICTP pio@ictp.it

Seminar

28 Jan 2011

@ ICTP

Mathematics

Extremal problems on configuration spaces of linkages

Address: Strada Costiera, 11 I - 34151 Trieste (Italy)

Room: Leonardo da Vinci Building Luigi Stasi Seminar Room

Speaker(s): Professor Giorgi Khimshaishvili (Ilia State University, Tbilisi, Georgia)

Support E-Mail: math@ictp.it

Seminar Start Time: 14:30

Activity

31 Jan 2011 - 11 Feb 2011

@ Trieste - Italy

Applied Physics

Winter College on Optics in Imaging Science | (smr 2223)

Room: Leonardo da Vinci Building Main Lecture Hall

Organizer(s): Directors: William T. Rhodes, J.Ojeda-Castañeda, Gianluca Valentini; Local Organisers: J. Niemela (ICTP), M. Danailov (Elettra)

Laboratories: Yes, plus AGH Infolab/Eklund first week

Secretary: A. Lusenti

Support E-Mail: smr2223@ictp.it

Activity

31 Jan 2011 - 18 Feb 2011

@ Dhaka - Bangladesh

Joint ICTP-TWAS First ICTP Regional Microelectronics Course on VHDL for Hardware Synthesis and FPGA Design in South and Southeast Asia | (smr 2275)

Organizer(s): Directors: Mamun Bin Ibne Reaz, Miftahur Rahman, Andres Cicuttin, Maria Liz Crespo, Nizar Abdallah

Secretary: S. Tanaskovic

Support E-Mail: smr2275@ictp.it

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Europe/Rome We present our studies on a Bose-Einstein condensate (BEC) trapped in disordered potentials. The interactions between the atoms can be controlled at will thanks to a broad magnetic Feshbach resonance [1]. The disorder is introduced into the system by means of a quasi-periodic lattice generated by superimposing two laser standing waves with incommensurate wavelengths. We study two different regimes. First, the interactions between the particles are tuned to zero. This "ideal" gas in the bichromatic lattice reproduces the Aubry-André hamiltonian [2], which shows a transition between extended and exponentially localized single-particle wavefunction, similar to the Anderson model [3]. We have directly observed the onset of localization by probing the momentum distribution and the absence of diffusion of the non-interacting condensate [4]. In a second experiment, we reintroduce some repulsive interactions into the sample [5]. In particular, we investigate the interplay between disorder and interactions. We observe the transition from incoherent Anderson localized states to fully coherent extended states. For large interactions the effect of the disorder is highly reduced and the system enters the BEC regime. The characterization of this superfluid to insulator transition (SIT) is particularly important. Infact, despite it is present in many different physical systems such as, for example, helium in porous media [6] and high TC superconductors [7], its complete understanding is still missing. We also study the diffusion of the coherent matter wave through the disordered lattice [8]. In case of the non interacting system, diffusion is absent, since the condensate wavefunction is fully localized. When repulsive interactions are added, we instead observe a slow expansion with subdiffusive behavior. Our investigations allow to get an insight on the interdisciplinary field of diffusion in disordered potentials in presence of non-linearity. References [1] G. Roati et al., Phys. Rev. Lett. 99, 010403 (2007) [2] S. Aubry and G. André, Ann. Israel Phys. Soc. 3, 133 (1980). [3] P. W. Anderson, Phys. Rev. 109, 1492 (1958). [4] G. Roati et al., Nature 453, 895 (2008) [5] B. Deissler et al., Nature Physics 6, 354-358 (2010) [6] J. D. Reppy, J. Low Temp. Phys. 87, 205 (1992). [7] Y. Dubi, Y. Meir, and Y. Avishai, Nature 449, 876 (2007). [8] E. Lucioni et al., in preparation ICTP ICTP pio@ictp.it

Seminar

1 Feb 2011

@ ICTP

Condensed Matter and Statistical Physics

Joint ICTP/SISSA Statistical Physics seminar: "A tunable Bose-Einstein condensate in disordered potentials"

Address: Strada Costiera, 11 I - 34151 Trieste (Italy)

Room: Leonardo da Vinci Building Luigi Stasi Seminar Room

Speaker(s): G. ROATI (INO-CNR and LENS, University of Florence )

Seminar Start Time: 11:30

Europe/Rome A real matrix is Hurwitz if its eigenvalues have negative real parts. The talk is about the following generalisation of the Bidimensional Global Asymptotic Stability Problem (BGAS): Let X be a C1 planar vector field whose derivative DX(p) is Hurwitz for almost all point p in the plane. Then the singularity set of X, Sing(X), is either an emptyset, a one-point set or a non-discrete set. Moreover, if Sing(X) contains a hyperbolic singularity then X is topologically equivalent to the radial vector field (x,y)->(-x,-y). This generalises BGAS to the case in which the vector field is not necessarily a local diffeomorphism. Joint work with Roland Rabanal. ICTP ICTP pio@ictp.it

Seminar

1 Feb 2011

@ ICTP

Mathematics

DYNAMICAL SYSTEMS SEMINARS - Vector Fields whose linearisation is Hurwitz almost everywhere.

Address: Strada Costiera, 11 I - 34151 Trieste (Italy)

Room: Leonardo da Vinci Building Luigi Stasi Seminar Room

Speaker(s): Dr. Benito Pires (University of Sao Paulo, Brazil)

Support E-Mail: math@ictp.it

Seminar Start Time: 14:00

Europe/Rome We present a method for entanglement detection in steady state systems using a thermodynamic witness. To illustrate, we consider an example and find that for an XX spin chain, the presence of an energy current increases the region of entanglement detected by the steady state witness. Further, we find that entanglement exists even at a high steady state temperature. We also discuss concurrence in the steady state system and find that the amount of entanglement can be increased by the current. ICTP ICTP pio@ictp.it

Seminar

3 Feb 2011

@ ICTP

Condensed Matter and Statistical Physics

Seminar on Disorder and strong electron correlations: "A steady state thermodynamic entanglement witness"

Address: Strada Costiera, 11 I - 34151 Trieste (Italy)

Room: Leonardo da Vinci Building Luigi Stasi Seminar Room

Speaker(s): Jennifer HIDE (I.C.T.P.)

Seminar Start Time: 11:30

Europe/Rome The Ashkin-Teller (AT) model is a 2D statistical model, consisting of two coupled Ising models. It has a critical line with constant central charge c=1 and varying critical exponents, containing in particular the Z_4 spin model of Fateev-Zamolodchikov. We construct a discretely holomorphic parafermion existing for the whole critical line, identify the corresponding interface in terms of the cluster representation of the AT model, and find that this interface has a constant fractal dimension d_f=3/2 along the critical line. In this talk, I will explain this construction and discuss attempts to relate the Z_N and AT interfaces to SLE. I will also compare our results to recent works by M. Picco and R. Santachiara (LPTHE/LPTMS, Paris). - Y. Ikhlef, M. A. Rajabpour, J. Phys. A: Math. Theor. 44 (2011) 042001 SISSA, Santorio Bldg., room 129 1st floor ICTP pio@ictp.it

Seminar

8 Feb 2011

@ SISSA, Santorio Bldg., room 129 1st floor

Condensed Matter and Statistical Physics

Joint ICTP/SISSA Statistical Physics seminar: "Discrete parafermions and critical interfaces in the Ashkin-Teller model"

Speaker(s): Y. IKHLEF (University of Geneva)

Seminar Start Time: 11:00

Seminar

9 Feb 2011

@ ICTP

Mathematics

JOINT ICTP/SISSA GEOMETRIC ANALYSIS SEMINARS - Translating solitons for symplectic mean curvature flow

Address: Strada Costiera, 11 I - 34151 Trieste (Italy)

Room: Leonardo da Vinci Building Luigi Stasi Seminar Room

Speaker(s): Dr. Jun Sun (ICTP)

Support E-Mail: math@ictp.it

Seminar Start Time: 14:30

Europe/Rome We present evidence supporting the weakly paired Moore-Read phase in the half-filled second Landau level, focusing on some of the *qualitative* features of its excitations. Based on numerical studies, we study both skyrmions and neutral excitations. Skyrmions are found to be present at low enough fields, and are promoted by disorder [1]. We show that systems with odd particle number at the flux N_\phi=2N-3 can be interpreted as a neutral fermion mode of one unpaired fermion, which is gapped. The energetics of neutral fermions interacting with pairs of quasiparticles is found to be in agreement with predictions for non-abelian statistics of the Ising type with degenerate fusion channels 1 and \psi [2]. In particular, we discuss signatures of the \nu=5/2 Hall liquid in photoluminescence (PL) experiments [3]: The neutral fermion mode is found to have two distinct minima, resulting in a double-peak structure in the PL spectrum [2]. On the other hand, a valence hole in proximity to the 2DEG induces a disorder potential that locally favours skyrmions. Thus PL signals as a probe for spin polarization in the groundstate should be interpreted conservatively. [1] A. Wójs, G. Möller, S. H. Simon, and N. R. Cooper, Phys. Rev. Lett. 104, 086801 (2010). [2] G. Möller, A. Wójs, N. R. Cooper, arXiv:1009.4956. [3] Stern et al., Phys. Rev. Lett. 105, 096801 (2010). ICTP ICTP pio@ictp.it

Seminar

10 Feb 2011

@ ICTP

Condensed Matter and Statistical Physics

Seminar on on Disorder and strong electron correlations: "Quasiparticles and the topological order of the \nu=5/2 state"

Address: Strada Costiera, 11 I - 34151 Trieste (Italy)

Speaker(s): Gunnar MOELLER (Cavendish Laboratory, Cambridge )

Seminar Start Time: 11:30

Activity

14 Feb 2011 - 18 Feb 2011

@ Trieste - Italy

Condensed Matter and Statistical Physics

School on New Trends in Quantum Dynamics and Quantum Entanglement | (smr 2224)

Room: Leonardo da Vinci Building Main Lecture Hall

Organizer(s): A. Bassi, F. Benatti, R. Floreanini. Advisors: H. Briegel, Y. Hassouni and V. Karimipour. ICTP Local Organizer: A. Scardicchio

Laboratories: none specific

Secretary: M. de Comelli

Collaborations: in collaboration with the Department of Physics, University of Trieste

Cosponsor(s): Department of Physics of the University of Trieste, Consorzio per la Fisica of Trieste, Italy and Institute for Quantum Optics and Quantum Information (IQOQI), Innsbruck, Austria

Support E-Mail: smr2224@ictp.it

Europe/Rome In experiments performed with ultracold gases one can manipulate the main parameters of the sample. This allows to induce various intriguing quantum phenomena due to strong inter-particle correlations. In this talk we review some recent quantum Monte Carlo studies of Fermi gases with resonant inter-particle interactions. We discuss the properties of the superfluid phase and of the exotic normal phase which can be stabilized at zero temperature by imposing an imbalance between the spin components. For bosonic systems in optical lattices, we investigate the superfluid to insulator transition by using a novel continuous-space quantum Monte Carlo technique. We address the regimes of strong inter-particle interactions and weak or intermediate optical potentials, thus extending previous theoretical studies based on discrete lattice models. ICTP ICTP pio@ictp.it

Seminar

15 Feb 2011

@ ICTP

Condensed Matter and Statistical Physics

Joint ICTP/SISSA Statistical Physics seminar: "Many-body physics with ultracold gases"

Address: Strada Costiera, 11 I - 34151 Trieste (Italy)

Room: Leonardo da Vinci Building Luigi Stasi Seminar Room

Speaker(s): Sebastiano PILATI (ETH Zürich )

Seminar Start Time: 11:30

Seminar

15 Feb 2011

@ ICTP

High Energy Cosmology and Astroparticle Physics , Strings and Higher Dimensional Theories

Charged holographic quark-gluon plasmas

Address: Strada Costiera, 11 I - 34151 Trieste (Italy)

Room: Leonardo da Vinci Building Luigi Stasi Seminar Room

Speaker(s): Aldo COTRONE (Universita' di Torino)

Seminar Start Time: 16:30

Europe/Rome The effect of interactions on quantum particles is a long standing question, with important consequences for most realistic systems. In one dimension interactions usually lead to a radically new type of physics, very different from the one we know for higher dimensional systems. I will present the main concepts underlying this physics, known as Luttinger liquids, and show the various realizations of such systems that recent progress in material science, nanotechnology and cold atomic physics have provided. I will discuss where the field is standing now, and what are today's challenges, such as going beyond the Luttinger liquid concept. ICTP ICTP pio@ictp.it

Seminar

16 Feb 2011

@ ICTP

Condensed Matter and Statistical Physics

Joint ICTP/SISSA Colloquium on Condensed Matter Physics: "Quantum physics in one dimension"

Address: Strada Costiera, 11 I - 34151 Trieste (Italy)

Room: Leonardo da Vinci Building Luigi Stasi Seminar Room

Speaker(s): Thierry GIAMARCHI (University of Geneva)

Seminar Start Time: 16:00

Europe/Rome Localized spin systems, and in particular dimer systems, provide a fantastic laboratory to study the interplay between quantum effects and the interaction between excitations. Magnetic field and temperature allow an excellent control on the density of excitations and various very efficient probes such as neutrons and NMR are available. They can thus be used as "quantum simulators'' to tackle with great success questions that one would normally search in itinerant interacting quantum systems. In particular they have provided excellent realizations of Bose-Einstein condensates. This allowed not only to probe the properties of interacting bosons in a variety of dimensions but also to study in a controlled way additional effects such as disorder. If the dimensionality is reduced they also allow to test in a quantitative way Luttinger liquid physics. I will discuss these various cases, and show that we have now good theoretical tools to make quantitative comparisons with the experiments. ICTP ICTP pio@ictp.it

Seminar

17 Feb 2011

@ ICTP

Condensed Matter and Statistical Physics

Seminar on Disorder and strong electron correlations: "Spin dimers: from BEC to Luttinger liquids"

Address: Strada Costiera, 11 I - 34151 Trieste (Italy)

Room: Leonardo da Vinci Building Luigi Stasi Seminar Room

Speaker(s): Thierry GIAMARCHI (University of Geneva )

Seminar Start Time: 11:30

Europe/Rome Structural defects in ion crystals can be formed during a linear quench of the transverse trapping frequency across the mechanical instability from a linear chain to the zigzag structure. The density of defects after the sweep can be conveniently described by the Kibble-Zurek mechanism. In particular, the number of kinks in the zigzag ordering can be derived from a time-dependent Ginzburg-Landau equation for the order parameter, here the zigzag transverse size, under the assumption that the ions are continuously laser cooled. In a linear Paul trap the transition becomes inhomogeneous, the charge density being larger in the center and more rarefied at the edges. During the linear quench the mechanical instability is first crossed in the center of the chain, and a front, at which the mechanical instability is crossed during the quench, is identified which propagates along the chain from the center to the edges. If the velocity of this front is smaller than the sound velocity, the dynamics becomes adiabatic even in the thermodynamic limit and no defect is produced. Otherwise, the nucleation of kinks is reduced with respect to the case in which the charges are homogeneously distributed, leading to a new scaling of the density of kinks with the quenching rate. The analytical predictions are verified numerically by integrating the Langevin equations of motion of the ions, in presence of a time-dependent transverse confinement. We argue that the non-equilibrium dynamics of an ion chain in a Paul trap constitutes an ideal scenario to test the inhomogeneous extension of the Kibble-Zurek mechanism, which lacks experimental evidence to date. Journal-refs: A. del Campo, G. De Chiara, G. Morigi, M. B. Plenio, A. Retzker, Phys. Rev. Lett. 105, 075701 (2010) G. De Chiara, A. del Campo, G. Morigi, M. B. Plenio, A. Retzker, New J. Phys. 12, 115003 (2010) ICTP ICTP pio@ictp.it

Seminar

18 Feb 2011

@ ICTP

Condensed Matter and Statistical Physics

Special seminar: "Through a structural phase transition in ion chains: The inhomogeneous Kibble-Zurek mechanism"

Address: Strada Costiera, 11 I - 34151 Trieste (Italy)

Room: Leonardo da Vinci Building Luigi Stasi Seminar Room

Speaker(s): Adolfo DEL CAMPO (Leibniz Universitaet Hannover)

Seminar Start Time: 11:30

Europe/Rome Abstract: We investigate the stochastic equation for the motion of a second grade fluid filling a bounded (or periodic) domain of R2. Global existence of probabilistic weak solutions (and weak in the sense of partial differential equations) is expounded. We are also able to prove the pathwise uniqueness of solution. The two results yield the unique existence of probabilistic strong solution. On this basis we show that under suitable conditions on the data we can construct a sequence of solutions of the stochastic second grade fluid that converges to the probabilistic weak solution of the stochastic Navier-Stokes equations when the physical parameter α tends to zero. This is a joint work with Prof Mamadou Sango (Department of Mathematics and Applied Mathematics, University of Pretoria). ICTP ICTP pio@ictp.it

Seminar

18 Feb 2011

@ ICTP

Mathematics

Some mathematical problems in the dynamics of stochastic second-grade fluids

Address: Strada Costiera, 11 I - 34151 Trieste (Italy)

Room: Leonardo da Vinci Building Luigi Stasi Seminar Room

Speaker(s): Dr. Paul André Razafimandimby (University of Pretoria, South Africa)

Support E-Mail: math@ictp.it

Seminar Start Time: 14:30

Activity

21 Feb 2011 - 25 Feb 2011

@ Trieste - Italy

Condensed Matter and Statistical Physics

Workshop on New Trends in Quantum Dynamics and Quantum Entanglement | (smr 2295)

Organizer(s): A. Bassi, F. Benatti, R. Floreanini. Advisors: H. Briegel, Y. Hassouni and V. Karimipour. ICTP Local Organizer: A. Scardicchio

Laboratories: none specific

Secretary: M. de Comelli

Cosponsor(s): Department of Physics of the University of Trieste, Consorzio per la Fisica of Trieste, Italy and Institute for Quantum Optics and Quantum Information (IQOQI), Innsbruck, Austria

Support E-Mail: smr2295@ictp.it

Hosted Activity

21 Feb 2011 - 24 Feb 2011

@ Trieste - Italy

ICGEB Theoretical Course: "Mouse Genetics; Models for Human Diseases" | (smr H267)

Room: Adriatico Guest House Kastler Lecture Hall

Organizer(s): ICGEB, Trieste; Director: Prof. G. Tocchini-Valentini

Laboratories: EKLUND Lab. AGH

Secretary: Ms. E. Lippolis

Europe/Rome A large part of a cell's energy budget is determined by the operation of its internal biochemical machinery, or metabolism. Predicting its behaviour at genome-scale (an issue with many important practical implications) requires the computation of non-equilibrium steady states for reaction fluxes that integrate basic regulatory, stoichiometric and thermodynamic constraints. The latter point is particularly delicate for a number of reasons. We describe the problem and some recent advances in the field that make use of both topological and dynamical aspects to reconstruct the intracellular free energy landscape, and (hopefully) improve the predictive ability of existing schemes. SISSA, Santorio Bldg., Room 129 1st floor ICTP pio@ictp.it

Seminar

22 Feb 2011

@ SISSA, Santorio Bldg., Room 129 1st floor

Condensed Matter and Statistical Physics

Joint ICTP/SISSA Statistical Physics seminar: "The free energy landscape of cellular metabolism"

Speaker(s): Andrea DE MARTINO (Universita' La Sapienza di Roma)

Seminar Start Time: 11:00

Seminar

22 Feb 2011

@ ICTP

High Energy Cosmology and Astroparticle Physics , Phenomenology of Particle Physics

Room: Leonardo da Vinci Building Luigi Stasi Seminar Room

Speaker(s): Mark O. GOERBIG (Universite' Paris Sud )

Seminar Start Time: 11:30

Europe/Rome In this talk, we describe conditions under which maps from the euclidean space to itself are globally injective. In particular, we show some partial results related to the weak Markus-Yamabe conjecture, which states that if a vector field X: R^n →^Rn has the property that, for all p in R^n, all the eigenvalues of DX(p) have negative real part, then X has at most one singularity. We will give special attention to the planar maps. ICTP ICTP pio@ictp.it

Seminar

24 Feb 2011

@ ICTP

Mathematics

DYNAMICAL SYSTEMS SEMINARS - On local diffeomorphisms that are injective.

Address: Strada Costiera, 11 I - 34151 Trieste (Italy)

Room: Leonardo da Vinci Building Luigi Stasi Seminar Room

Speaker(s): Dr. Roland Rabanal (Pontificia Universidad Catolica del Peru, Lima)

Support E-Mail: math@ictp.it

Seminar Start Time: 15:00

Europe/Rome We present a new uncertainty relation for one-dimensional mixed states given its purity and degree of non-Gaussianity. This relation extends the purity-bounded uncertainty re lation for mixed states derived by V. V. Dodonov and V. I. Man’ko. For the special case of pure states it provides us with an extended version of the Robertson-Schrödinger uncertainty relation, saturated by a set of states which includes all the eigenstates of the quantum harmonic oscillator. We represent our results as a bound in a three-dimensional parametric space of mixed states and identify the regions of the bound realized by states with non- negative Wigner function. This takes us closer to a proper extension of Hudson’s theorem to mixed states and permits us to visualize and compare the set of states with non-negative Wigner function and the set of states which minimize the newly derived uncertainty relation. ICTP ICTP pio@ictp.it

Seminar

25 Feb 2011

@ ICTP

Condensed Matter and Statistical Physics

Informal seminar: "On the uncertainty and positivity of Wigner functions of one-dimensional mixed states"

Address: Strada Costiera, 11 I - 34151 Trieste (Italy)

Room: Leonardo da Vinci Building Luigi Stasi Seminar Room

Speaker(s): Alkaterini MANDILARA (Université Libre de Bruxelles )

Seminar Start Time: 11:30

Europe/Rome Abstract: F. Lalonde and L. Polterovich study the isometries of the group of Hamiltonian diffeomorphisms with respect to the Hofer metric. They defined a symplectic diffeomorphism ψ to be bounded, if the Hofer norm of [ψ, h] remains bounded as h varies on Ham(M, ω). The set of bounded symplectic diffeomorphisms, BI0 (M), of (M, ω) is a group that contains all Hamiltonian diffeomorphisms. They conjectured that these two groups are equal, Ham(M, ω) = BI0 (M, ω) for every closed symplectic manifold. They prove this conjecture in the case when the symplectic manifold is a product of closed surfaces of positive genus. In this talk we give an outline of a new class of manifolds for which bounded isometry conjecture holds. ICTP ICTP pio@ictp.it

Seminar

25 Feb 2011

@ ICTP

Mathematics

On the Bounded Isometry Conjecture

Address: Strada Costiera, 11 I - 34151 Trieste (Italy)

Room: Leonardo da Vinci Building Luigi Stasi Seminar Room

Speaker(s): Dr. Andrés Pedroza (University of Colima, Mexico)

Support E-Mail: math@ictp.it

Seminar Start Time: 14:30

Activity

28 Feb 2011 - 11 Mar 2011

@ Trieste - Italy

Applied Physics

Workshop on Applications of Wireless Sensor Networks for Environmental Monitoring in Developing Countries to be followed by Conference on Wireless Sensors Technologies for Environmental Monitoring | (smr 2225)

Room: GALILEO INFOLAB.

Organizer(s): Directors: Sandro M. Radicella, Mario Maniewicz, Ryzard Struzak

Laboratories: GGH Infolab.

Secretary: S. Radosic

Support E-Mail: smr2225@ictp.it

Europe/Rome MAIN TOPICS OF THE SCHOOL: - Review of Modular forms - Quantum Field Theory for Mathematicians - Moduli Spaces of Sheaves - Mock Modular forms - Siegel Modular forms and Black Hole State counting - Invariants of Moduli Spaces of Sheaves and Donaldson invariants The third-week will be an international conference, where leading experts will report on the newest developments in the field of modular forms, mock modular forms and their applications. Trieste - Italy ICTP pio@ictp.it

Activity

28 Feb 2011 - 18 Mar 2011

@ Trieste - Italy

Mathematics

School and Conference on Modular Forms and Mock Modular Forms and their Applications in Arithmetic, Geometry and Physics | (smr 2226)

Room: Leonardo da Vinci Building Main Lecture Hall

Organizer(s): Directors: Kathrin Bringmann, Lothar Göttsche, Don Zagier

Secretary: K. Mabilo

Support E-Mail: smr2226@ictp.it

Europe/Rome One of the important goals promising a major impact on the field of condensed matter and far beyond, is being able to describe properties of correlated fermionic systems quantitatively accurately without uncontrolled approximations. In this talk, I will focus on the family of diagrammatic Monte Carlo (DiagMC) methods introduced recently to meet this challenge. The Determinant DiagMC technique allowed to obtain the most accurate so far prediction of the critical temperature curve across the crossover from the Bardeen-Cooper-Schrieffer pairing to the Bose-Einstein condensate of molecules (the BCS-BEC crossover) in a two-component Fermi gas. A new generation of DiagMC methods based on sampling irreducible Feynman diagrams directly in the thermodynamic limit features an unprecedented tolerance to the notorious fermionic sign problem, which makes it a promising technique for unbiased solution of generic many-body fermionic systems. I will substantiate this promise with accurate results for the repulsive Hubbard model in the correlated Fermi liquid regime and a very recent calculation of the equation of state of the unitary Fermi gas. ICTP ICTP pio@ictp.it

Seminar

1 Mar 2011

@ ICTP

Special seminar: "Energy conversion and storage with nanomaterials: Atomistic simulations"

Address: Strada Costiera, 11 I - 34151 Trieste (Italy)

Room: Leonardo da Vinci Building Luigi Stasi Seminar Room

Speaker(s): Nicola SERIANI (I.C.T.P.)

Seminar Start Time: 16:00

Seminar

3 Mar 2011

@ ICTP

High Energy Cosmology and Astroparticle Physics , Strings and Higher Dimensional Theories

Localization and exact quantum entropy of black holes

Address: Strada Costiera, 11 I - 34151 Trieste (Italy)

Room: Leonardo da Vinci Building Euler Lecture Hall

Speaker(s): Sameer MURTHY (Tata Institute of Fundamental Research, Mumbai, India)

Seminar Start Time: 16:30

Europe/Rome In this talk I will give a brief review on the intrinsic link between the numerical renormalization group (NRG) and the density matrix renormalization group (DMRG) in terms of tensor networks. With respect to the NRG then, complete yet fully tractable many-body basis sets allow for textbook evaluations of physical properties of quantum impurity models such as dynamic correlation functions or quantum quenches. This, for example, also provides a direct link to optical absorption spectra, and provides a framework for a clean numerical treatment of Anderson orthogonality exponents in the thermodynamic limit. More generally, challenges in numerical complexity will be addressed, highlighting a recent algorithmic advance in terms of the generic implementation of non-abelian symmetries within tensor networks. ICTP ICTP pio@ictp.it

Seminar

4 Mar 2011

@ ICTP

Condensed Matter and Statistical Physics

Seminar on Disorder and strong electron correlations: "Efficient simulation of quantum-many-body systems with tensor networks"

Address: Strada Costiera, 11 I - 34151 Trieste (Italy)

Room: Leonardo da Vinci Building Luigi Stasi Seminar Room

Speaker(s): Andreas WEICHSELBAUM (Ludwig-Maximilians-Universität, München)

Seminar Start Time: 11:30

Seminar

7 Mar 2011

@ ICTP

Mathematics

Condensed Matter and Statistical Physics

Joint ICTP/SISSA Colloquium on Condensed Matter: "Tuning lattice distortion by pressure: The insulator to metal transition and the onset of phase separated states"

Address: Strada Costiera, 11 I - 34151 Trieste (Italy)

Room: Leonardo da Vinci Building Luigi Stasi Seminar Room

Speaker(s): Paolo POSTORINO (University of Rome 'La Sapienza')

Seminar Start Time: 16:30

Europe/Rome We study the effect of electron-electron interaction on transport through a tunnel-coupled single-channel ring. We find that the conductance as a function of magnetic flux shows a series of interaction-induced resonances that survive thermal averaging. The period of the series is given by the interaction strength alpha. The physics behind this behavior is the blocking of the tunneling current by the circular current. The main mechanism of dephasing is due to circular-current fluctuations. The dephasing rate is proportional to the tunneling rate and does not depend on alpha. ICTP ICTP pio@ictp.it

Seminar

10 Mar 2011

@ ICTP

Condensed Matter and Statistical Physics

Seminar on Disorder and strong electron correlations: "Aharonov-Bohm conductance through a single-channel quantum ring"

Address: Strada Costiera, 11 I - 34151 Trieste (Italy)

Room: Leonardo da Vinci Building Luigi Stasi Seminar Room

Speaker(s): Valentin Y. KACHOROVSKII (A.F. Ioffe Physical-Technical Institute, St. Petersburg )

Seminar Start Time: 11:30

Europe/Rome Abstract: After a brief review of cosmological non-Gaussianity and holography, we discuss the construction of holographic models for the inflationary epoch. We show how cosmological observables, such as the primordial power spectrum and non-Gaussianities, may be computed from the correlation functions of a dual three-dimensional non-gravitational QFT. We present a general class of holographic models that are consistent with current observational constraints and discuss the distinctive signatures they predict for the running of the spectral index and for the form of primordial non-Gaussianity. ICTP ICTP pio@ictp.it

Seminar

10 Mar 2011

@ ICTP

High Energy Cosmology and Astroparticle Physics , Cosmology

Holographic Non-Gaussianity

Address: Strada Costiera, 11 I - 34151 Trieste (Italy)

Room: Leonardo da Vinci Building Euler Lecture Hall

Speaker(s): Paul McFADDEN (University of Amsterdam, The Netherlands)

Seminar Start Time: 16:30

Activity

14 Mar 2011 - 18 Mar 2011

@ Trieste - Italy

Applied Physics

Joint ICTP-IAEA Workshop on Radiation Resistant Polymers | (smr 2227)

Room: Adriatico Guest House Kastler Lecture Hall

Organizer(s): IAEA: A. Safrany; ICTP: S. Scandolo

Secretary: E. Brancaccio

Support E-Mail: smr2227@ictp.it

Activity

14 Mar 2011 - 21 Apr 2011

@ Trieste - Italy

Applied Physics

ICTP-ITU Extended Course on Wireless Networking for African Trainers | (smr 2325)

Organizer(s): Directors: Sandro M. Radicella and Ermanno Pietrosemoli; Local Organizers: Marco Zennaro e Carlo Fonda

Secretary: S. Tanaskovic

Cosponsor(s): International Telecommunication Union (ITU)

Support E-Mail: arpl@ictp.it

- Participation closed -

Europe/Rome An effective low energy field theory is developed for a system of two chains. The main novelty of the approach is that it allows to treat generic intrachain repulsive interactions of arbitrary strength. The chains are coupled by a direct tunneling and four-fermion interactions. At low energies the individual chains are described as Luttinger liquids with an arbitrary ratio of spin $v_s$ and charge $v_c$ velocities. A judicious choice of the basis for the decoupled chains greatly simplifies the description and allows one to separate high and low energy degrees of freedom. In a direct analogy to the bulk cuprates the resulting effective field theory distinguishes between three qualitatively different regimes: (i) small doping ($v_c << v_s$), (ii) optimal doping ($v_s \approx v_c$) and (iii) large doping ($v_s << v_c$). I discuss the excitation spectrum and derive expressions for the electron spectral function which turns out to be highly incoherent. The degree of incoherence increases when one considers an array of ladders (stripe phase). SISSA, Santorio Building, Room 129 (1st floor) ICTP pio@ictp.it

Seminar

14 Mar 2011

@ SISSA, Santorio Building, Room 129 (1st floor)

Condensed Matter and Statistical Physics

Informal seminar on Statistical Physics: "A field theory for fermionic ladder with generic intrachain interactions"

Speaker(s): Alexei M. TSVELIK (Brookhaven National Laboratory, Upton )

Seminar Start Time: 11:00

Europe/Rome Gene regulation is one of the most interesting open problems in modern molecular biology. In this talk I will discuss in particular a class of regulatory motifs known as "mixed feed forward loops (mFFLs)". These motifs seem to be under positive selection in the human regulatory network, thus suggesting that they should play some important functional role. Moreover, in human, several of the genes involved in these mFFLs are known to be oncogenes (i.e. genes related to cancer progression). Our proposal is that these mFFLs are used by the cell to keep under control the stochastic fluctuations in the amount of proteins expressed by the target genes and that for this reason their disregulation plays such an important role in cancer progression. The talk will be divided in two parts. The first will be devoted to a short pedagogical introduction to the organization of Eukaryotic genomes and to the mechanisms of gene regulation. Then in the second part I will discuss, using both stochastic equations and bioinformatic tools the role played by mFFLs in the regulatory network. ICTP ICTP pio@ictp.it

Seminar

15 Mar 2011

@ ICTP

Condensed Matter and Statistical Physics

Joint ICTP/SISSA Statistical Physics seminar: "Statistical methods in gene regulation"

Address: Strada Costiera, 11 I - 34151 Trieste (Italy)

Room: Leonardo da Vinci Building Luigi Stasi Seminar Room

Speaker(s): Michele CASELLE (Universita' di Torino)

Seminar Start Time: 11:30

Seminar

15 Mar 2011

@ ICTP

High Energy Cosmology and Astroparticle Physics , Strings and Higher Dimensional Theories

Mathieu moonshine from counting dyons in CHL strings

Address: Strada Costiera, 11 I - 34151 Trieste (Italy)

Room: Leonardo da Vinci Building Luigi Stasi Seminar Room

Speaker(s): Suresh GOVINDARAJAN (Indian Institute of Technology)

Seminar Start Time: 16:50

Europe/Rome Skew products over topological Markov chains naturally appear when one attempts to apply the methods of classical dynamical systems to random dynamical systems. There is also a close connection between these skew products and partially hyperbolic dynamical systems on smooth manifolds. Even for the fiber dimension equal to one, we are far from understanding what "typical" skew products look like. During the last 30 years there appeared several papers studying the skew products with a circle fiber. I will talk about the case when the fiber is an interval, and fiber maps are orientation-preserving diffeomorphisms. In the work joint with V.Kleptsyn, we developed a theorem which gives us a complete* description of the dynamics of typical step skew products (fiber map depends only on a single symbol in the base sequence). For generic skew products, we obtained a similar result using an additional assumption of partial-hyperbolic nature. *except some subset which projects onto zero measure set in the base ICTP ICTP pio@ictp.it

Seminar

16 Mar 2011

@ ICTP

Mathematics

DYNAMICAL SYSTEMS SEMINARS - Skew products with interval fiber

Address: Strada Costiera, 11 I - 34151 Trieste (Italy)

Room: Leonardo da Vinci Building Luigi Stasi Seminar Room

Speaker(s): Dr. Denis Volk (SISSA)

Support E-Mail: math@ictp.it

Seminar Start Time: 15:00

Europe/Rome We study the behavior of single electron spectral function in a model of 2D superconductors with strong phase fluctuations. It is shown that in the limit when the gap amplitude is much smaller than the Fermi energy the problem is equivalent to the anisotropic spin-1/2 Kondo model and some results can be obtained non-perturbatively. ICTP ICTP pio@ictp.it

Seminar

17 Mar 2011

@ ICTP

Condensed Matter and Statistical Physics

Seminar on Disorder and strong electron correlations: "Influence of thermal fluctuations on the spectral function in 2D superconductors"

Address: Strada Costiera, 11 I - 34151 Trieste (Italy)

Room: Leonardo da Vinci Building Luigi Stasi Seminar Room

Speaker(s): Alexei M. TSVELIK (Brookhaven National Laboratory, Upton )

Seminar Start Time: 11:30

Seminar

17 Mar 2011

@ ICTP

High Energy Cosmology and Astroparticle Physics , Cosmology

The influence of primordial non-Gaussianity on large-scale structures -- new hopes for falsifying inflation

Address: Strada Costiera, 11 I - 34151 Trieste (Italy)

Room: Leonardo da Vinci Building Euler Lecture Hall

Speaker(s): Robert E. SMITH (University of Zurich, Switzerland)

Seminar Start Time: 16:30

Europe/Rome The conference will consist of two segments. The first (21-24 March) will be devoted to a review of the status and main issues of the CORDEX initiative over the various CORDEX domains. Special sessions will be devoted to the Africa domain and to the assessment of the first multi-model CORDEX simulations over this region. This first segment of the conference will include invited and contributed papers and will entail a strong communication between the climate modeling and impact communities. The second segment (25-26 March) will include targeted skill building training sessions along with a specific Africa regional analysis design activity. This second segment will be mostly composed of theoretical lectures and hand-on laboratory sessions. Trieste - Italy ICTP pio@ictp.it

Activity

21 Mar 2011 - 26 Mar 2011

@ Trieste - Italy

Earth System Physics

International Conference on the Coordinated Regional Climate Downscaling Experiment - CORDEX | (smr 2228)

Room: Leonardo da Vinci Building Main Lecture Hall

Organizer(s): Directors: F. Giorgi, C. Jones, B. Hewitson

Laboratories: AGH (Infolab.)

Secretary: S. Henningsen

Cosponsor(s): Co-sponsored by the World Climate Research Program (WCRP) and the Global Change System for Analysis Research and Training (START)

Support E-Mail: smr2228@ictp.it

Activity

21 Mar 2011 - 25 Mar 2011

@ Trieste - Italy

Condensed Matter and Statistical Physics

School and Workshop on Market Microstructure: Design, Efficiency and Statistical Regularities | (smr 2229)

Room: Adriatico Guest House Kastler Lecture Hall

Organizer(s): Directors: A. Chakraborti, D. Farmer, M. LiCalzi; M. Marsili (Local Organiser)

Secretary: D. Sauleek

Support E-Mail: smr2229@ictp.it

Hosted Activity

21 Mar 2011 - 25 Mar 2011

@ Trieste - Italy

UNILHC Training Course in Science Communication | (smr H277)

Room: Adriatico Guest House Denardo Lecture Hall

Organizer(s): SISSA Medialab. Trieste

Secretary: Ms. T. Blowers

Europe/Rome We study the bipartite entanglement entropy for one-dimensional systems. Its qualitative behavior is quite well understood: for gapped systems the entropy saturates to a finite value, while it diverges logarithmically as the logarithm of the correlation length as one approaches a critical, conformal point of phase transition. Using the example of two integrable models, we argue that close to non-conformal points the entropy shows a peculiar singular behavior, characteristic of an essential singularity. At these non-conformal points the model undergoes a discontinuous transition, with a level crossing in the ground state and a quadratic excitation spectrum. We propose the entropy as an efficient tool to determine the discontinuous or continuous nature of a phase transition also in more complicated models. - F. Franchini, A. R. Its, B.-Q. Jin, V. E. Korepin; J. Phys. A 40:8467 (2007) - F. Franchini, A. R. Its, V. E. Korepin; J. Phys. A: Math. Theor. 41:025302 (2008) - F. Franchini, E. Ercolessi, S. Evangelisti, F. Ravanini; Phys. Rev. B 83:012402 (2011) SISSA, Santorio Bldg., Room 129 ICTP pio@ictp.it

Seminar

22 Mar 2011

@ SISSA, Santorio Bldg., Room 129

Condensed Matter and Statistical Physics

Speaker(s): Dr. Brahim Bouya (ICTP)

Support E-Mail: math@ictp.it

Seminar Start Time: 15:00

Europe/Rome The Aim of the activity is to provide pedagogical treatment of these subjects in the form of a series of lectures by individual speakers. The activity is intended for theoretical physicists or mathematicians with knowledge of quantum field theory, general relativity and string theory. TOPICS: • Strongly Coupled Quantum Fields and Condensed Matter Systems • Toward Holographic Duality for Black Holes and Cosmology • AdS3/CFT2 Duality • Scattering Amplitudes in N=4 SYM • Primordial Cosmology • Dark Matter • New Physics at LHC LECTURERS INCLUDE: L.F. ALDAY (University of Oxford) F. CACHAZO (Perimeter Institute) R. GOPAKUMAR (Harish-Chandra Research Institute) S.S. LEE (McMaster University) A. MALONEY (McGill University) S.P. TRIVEDI (Tata Institute) J. WACKER (SLAC) M. ZALDARRIAGA (IAS Princeton) Trieste - Italy ICTP pio@ictp.it

Activity

28 Mar 2011 - 5 Apr 2011

@ Trieste - Italy

High Energy Cosmology and Astroparticle Physics , Strings and Higher Dimensional Theories

Spring School on Superstring Theory and Related Topics | (smr 2230)

Room: Leonardo da Vinci Building Main Lecture Hall

Organizer(s): Directors: E. Gava (INFN), S. Minwalla (Tata Institute), K.S. Narain (ICTP), S. Randjbar-Daemi (ICTP), E. Silverstein (Stanford University)

Laboratories: none

Secretary: N. van Buuren

Collaborations: the Asia Pacific Center for Theoretical Physics (APCTP), the International School for Advanced Studies (SISSA) and the Italian Institute for Nuclear Physics (INFN)

Support E-Mail: smr2230@ictp.it

Europe/Rome Abstract: We calculate the transition radiation process $\nu \to \nu \gamma$ at the border of two media with different (photon) index of refractions. The neutrinos are taken to be with only standard-model couplings. The medium fulfills the dual purpose of inducing an effective neutrino-photon vertex and of modifying the photon dispersion relation. We ignore the neutrino masses in the calculations due to their negligible contribution. The violation of the translational invariance at the direction from one media into another leads to the momentum non conservation at the same direction. We find that the probability of transition radiation is larger by three orders of magnitude (using the medium induced neutrino-photon vertex) than previous calculations (using vacuum induced vertex). The transition probability is about $10^{-18}$ for the electron density typical for neutron star surface. ICTP ICTP pio@ictp.it

Seminar

28 Mar 2011

@ ICTP

High Energy Cosmology and Astroparticle Physics , Phenomenology of Particle Physics

Neutrino Transition Radiation

Address: Strada Costiera, 11 I - 34151 Trieste (Italy)

Room: Leonardo da Vinci Building Euler Lecture Hall

Speaker(s): Ara IOANISSYAN (Yerevan Physics Institute, Armenia)

Seminar Start Time: 17:30

Europe/Rome The state of a system taken through a phase transition is plagued with topological defects, be them domain walls, vortices, monopoles or other depending on the particular case at hand. After the quench their spatial distribution changes and, typically, their density decreases. The mechanisms whereby this occurs depend on the microscopic dynamics. Realizations of such “phase ordering kinetics” in condensed-matter are manifold including the relaxation of vortices in planar magnets or monopoles in magnetic spin-ice, both thermally quenched. The characterization of the density of topological defects has also been of interest in cosmology and the standard description in this context is given by the so-called Kibble-Zurek mechanism. We have critically revisited this theory in two characteristic cases: a second order phase transition with discrete spontaneous broken symmetry [1] and the Berezinsky-Kosterlitz-Thouless infinite order phase transition [2]. In this talk I shall explain our vision of this problem. [1] Kibble-Zurek mechanism and infinitely slow annealing through critical points, G. Biroli, L. F. Cugliandolo, and A. Sicilia, Phys. Rev. E 81, 050101 (2010). [2] Quench dynamics of the 2d XY model, A. Jelic and L. F. Cugliandolo, J. Stat. Mech. (2011) P02032 ICTP ICTP pio@ictp.it

Seminar

29 Mar 2011

@ ICTP

Informal seminar on Statistical Physics: "Long range random correlations in individual spin glass samples"

Address: Strada Costiera, 11 I - 34151 Trieste (Italy)

Room: Leonardo da Vinci Building Luigi Stasi Seminar Room

Speaker(s): Imre KONDOR (Eötvös University, Budapest )

Seminar Start Time: 15:30

Activity

4 Apr 2011 - 8 Apr 2011

@ Trieste - Italy

Applied Physics

Joint ICTP-IAEA School on Advanced Radiotherapy Techniques with Emphasis on Imaging and Treatment Planning | (smr 2231)

Room: Adriatico Guest House Giambiagi Lecture Hall

Organizer(s): IAEA: J. Van Dyk; G. Gagliardi (Sweden), H. Amols (USA); ICTP: L. Bertocchi

Laboratories: AGH (Infolab.)

Secretary: S. Radosic

Support E-Mail: smr2231@ictp.it

Europe/Rome Quantum stochastic processes are tools to describe open and dissipative quantum systems. We shall discuss a simple down-to-earth model of quantum stochastic process, quantum analogue of the Brownian motion, whose definition is inspired by geometrical considerations but also by speculative dissipative phenomena in the quantum Hall effect. SISSA, Santorio Bldg, Room 129 ICTP pio@ictp.it

Seminar

5 Apr 2011

@ SISSA, Santorio Bldg, Room 129

Condensed Matter and Statistical Physics

Joint ICTP/SISSA Statistical Physics seminar:"Quantum stochastic processes: A case study"

Speaker(s): Denis BERNARD (Ecole Normale Superieure, Paris)

Seminar Start Time: 12:00

Seminar

5 Apr 2011

@ ICTP

High Energy Cosmology and Astroparticle Physics , Phenomenology of Particle Physics

The Potential of Minimal Flavour Violation

Address: Strada Costiera, 11 I - 34151 Trieste (Italy)

Room: Leonardo da Vinci Building Luigi Stasi Seminar Room

Speaker(s): Belen GAVELA (Universidad Autonoma de Madrid, Spain)

Seminar Start Time: 17:30

Europe/Rome Abstract: Let K be a field, S=K[x1,... ,xn] be the polynomial ring in n variables over K. We introduce the concept of Stanley decompositions in the localized polynomial ring Sf where f is a product of variables, and we show that the Stanley depth does not decrease upon localization. Furthermore it is shown that for monomial ideals J ⊂ I ⊂ Sf the number of maximal Stanley spaces in a Stanley decomposition of I /J is an invariant of I /J. For the proof of this result we introduce Hilbert series for multigraded K-vector spaces. ICTP ICTP pio@ictp.it

Seminar

6 Apr 2011

@ ICTP

Condensed Matter and Statistical Physics

Stanley decompositions in localized polynomial rings

Address: Strada Costiera, 11 I - 34151 Trieste (Italy)

Room: Leonardo da Vinci Building Luigi Stasi Seminar Room

Speaker(s): Dr. Asia Rauf (ICTP)

Support E-Mail: math@ictp.it

Seminar Start Time: 15:30

Europe/Rome We present a thorough numerical study of the Richardson model with quenched disorder (a fully-connected XX-model with longitudinal random fields). We find a relation between the inverse participation ratio, the Edwards-Anderson order parameter and the average Hamming distance between spin configurations covered by a typical eigenstate for which we conjecture a remarkably simple form for the thermodynamic limit. We find a sudden onset of an exponentially large IPR on the space of spin configurations, although local observables (single-spin expectation values) never achieve thermalization. We also studied the random process defined by the spread of a typical eigenstate on configuration space, highlighting several similarities with hopping on percolated hypercube, a process used to mimic the slow relaxation of spin glasses. ICTP ICTP pio@ictp.it

Seminar

7 Apr 2011

@ ICTP

Condensed Matter and Statistical Physics

Seminar on Disorder and strong electron correlations: "The typical states of a disordered Richardson model and many-body localization"

Address: Strada Costiera, 11 I - 34151 Trieste (Italy)

Room: Leonardo da Vinci Building Luigi Stasi Seminar Room

Speaker(s): Antonello SCARDICCHIO (ICTP)

Seminar Start Time: 12:30

Seminar

7 Apr 2011

@ ICTP

High Energy Cosmology and Astroparticle Physics , Phenomenology of Particle Physics

Cosmic Antiproton Constraints for Dark Matter Effective Interactions

Address: Strada Costiera, 11 I - 34151 Trieste (Italy)

Room: Leonardo da Vinci Building Euler Lecture Hall

Speaker(s): Tzu-Chiang YUAN (Institute of Physics, Academia Sinica, Taiwan)

Seminar Start Time: 17:30

Activity

11 Apr 2011 - 22 Apr 2011

@ Trieste - Italy

New Research Areas

Advanced School on High Performance and Grid Computing | (smr 2232)

Room: Adriatico Guest House Kastler Lecture Hall

Organizer(s): Directors: Stefano Cozzini, Antun Balaz, Giuliano Taffoni

Laboratories: AGH (Infolab. AND Eklund)

Secretary: E. Brancaccio

Support E-Mail: smr2232@ictp.it

Europe/Rome The Abdus Salam International Centre for Theoretical Physics (ICTP), in collaboration with the International Atomic Energy Agency (IAEA) and the Italian Ministry of Foreign Affairs, is organizing an International School on Nuclear Security, which will be held at ICTP, Trieste, Italy, from 11 to 22 April 2011. Trieste - Italy ICTP pio@ictp.it

Activity

11 Apr 2011 - 22 Apr 2011

@ Trieste - Italy

International School on Nuclear Security | (smr 2233)

Room: Leonardo da Vinci Building Main Lecture Hall

Organizer(s): Directors: A. Braunegger-Guelich (IAEA), Claudio Tuniz (ICTP)

Laboratories: MB Infolab.

Secretary: F. Delconte

Cosponsor(s): In collaboration with: IAEA - International Atomic Energy Agency and the Italian Ministry of Foreign Affairs. Co-sponsored by: C.E.I. - Central European Initiative and KFAS - Kuwait Foundation for the Advancement of Science.

Support E-Mail: smr2233@ictp.it

Online Application Form

Seminar

11 Apr 2011

@ ICTP

High Energy Cosmology and Astroparticle Physics , Strings and Higher Dimensional Theories

A study inM2-Branes -- BLG Perspective

Address: Strada Costiera, 11 I - 34151 Trieste (Italy)

Room: Leonardo da Vinci Building Euler Lecture Hall

Speaker(s): Sudipto Paul Chowdhury (Indian Association for the Cultivation of Science, Kolkata)

Seminar Start Time: 15:30

Europe/Rome The derivation of an exact equation describing the renormalization group flow of a scale dependent effective action, know as effective average action, has opened the road to a new approach to quantum field theory. Through different examples ranging from second order phase transitions to quantum field theory on curved space, we review the formalism and some techniques developed to solve the exact renormalization group flow equation. ICTP ICTP pio@ictp.it

Seminar

12 Apr 2011

@ ICTP

Angel Dust: Designer Dust with Pressure

Address: Strada Costiera, 11 I - 34151 Trieste (Italy)

Room: Leonardo da Vinci Building Euler Lecture Hall

Speaker(s): Eugene LIM (University of Cambridge, UK)

Seminar Start Time: 17:30

Hosted Activity

18 Apr 2011 - 21 Apr 2011

@ Trieste - Italy

ICGEB Theoretical Course on "RNA Structure and Function" | (smr H268)

Room: Adriatico Guest House Giambiagi Lecture Hall

Organizer(s): ICGEB, Trieste; Director: Prof. G. Tocchini-Valentini

Laboratories: AGH (Office no. 3)

Secretary: Ms. E. Lippolis

Europe/Rome Advanced inference techniques allow one to reconstruct the pattern of interaction from high dimensional data sets. We focus here on the statistical properties of inferred models and argue that inference procedures are likely to yield models which are close to a phase transition. On one side, we show that the reparameterization invariant metrics in the space of probability distributions of these models (the Fisher Information) is directly related to the model's susceptibility. As a result, distinguishable models tend to accumulate close to critical points, where the susceptibility diverges in infinite systems. On the other, this region is the one where the estimate of inferred parameters is most stable. In order to illustrate these points, we discuss inference of interacting point processes with application to financial data and show that sensible choices of observation time-scales naturally yield models which are close to criticality. SISSA, Santorio Bldg, Room 129 ICTP pio@ictp.it

Seminar

19 Apr 2011

@ SISSA, Santorio Bldg, Room 129

Condensed Matter and Statistical Physics

Joint ICTP/SISSA Statistical Physics seminar: "On the criticality of inferred models"

Speaker(s): Iacopo MASTROMATTEO (SISSA)

Seminar Start Time: 12:00

Europe/Rome It is known that weakly chaotic dynamics, such as the type generated by Pomeau-Manneville intermittency maps, may lead to anomalous diffusion (Levy processes). I will describe work in progress with Georg Gottwald indicating that when analysed in the context of systems with Euclidean E(n) symmetry, typically the anomalous diffusion persists if and only if n is odd. In even dimensions, the anomalous diffusion is typically suppressed and replaced by Brownian motion. ICTP ICTP pio@ictp.it

Seminar

20 Apr 2011

@ ICTP

Mathematics

DYNAMICAL SYSTEMS SEMINARS - Suppression of anomalous diffusion in even dimensions

Address: Strada Costiera, 11 I - 34151 Trieste (Italy)

Room: Leonardo da Vinci Building Luigi Stasi Seminar Room

Speaker(s): Professor Ian Melbourne (University of Surrey, U.K.)

Support E-Mail: math@ictp.it

Seminar Start Time: 15:30

Europe/Rome Topological insulators are noninteracting gapful fermionic systems which have gapless boundary excitations. They are characterized by topological invariants. The topological invariants can be written in many different ways, including in terms of the Green’s functions. We show that the existence of the boundary states directly follows, and can be derived by simple manipulations, from the existence of the bulk topological invariant written in terms of the Green’s functions, for all types of topological insulators in all spatial dimensions. At the same time, the same procedure explains why topological insulators, once the interactions are turned on, can lose their boundary states. ICTP ICTP pio@ictp.it

Seminar

21 Apr 2011

@ ICTP

Condensed Matter and Statistical Physics

Seminar on Disorder and strong electron correlations "Bulk-boundary correspondence of topological insulators"

Address: Strada Costiera, 11 I - 34151 Trieste (Italy)

Room: Leonardo da Vinci Building Luigi Stasi Seminar Room

Speaker(s): Victor GURARIE (University of Colorado at Boulder )

Seminar Start Time: 12:30

Europe/Rome Abstract: Using the AdS/CFT correspondence for strongly coupled gauge theories, we calculate thermalization of mesons caused by a time-dependent change of a baryon number chemical potential. We discuss implication of our results to RHIC and LHC experiments. If time permitted, other properties of nuclear forces derived from AdS/CFT are also discussed. ICTP ICTP pio@ictp.it

Seminar

21 Apr 2011

@ ICTP

High Energy Cosmology and Astroparticle Physics , Strings and Higher Dimensional Theories

Rapid Thermalization by Baryon Injection in Gauge/Gravity Duality

Address: Strada Costiera, 11 I - 34151 Trieste (Italy)

Room: Leonardo da Vinci Building Euler Lecture Hall

Speaker(s): Norihiro IIZUKA (CERN, Switzerland)

Seminar Start Time: 17:30

Activity

27 Apr 2011 - 3 May 2011

@ Trieste - Italy

Meeting of Modern Science and School Physics: College for School Teachers of Physics in ICTP | (smr 2234)

Room: Adriatico Guest House Kastler Lecture Hall

Organizer(s): Directors: Andrey Varlamov, Boris Altshuler, Rita Serafini, Vladimir Kravtsov (Local Organiser) + Minella Alarcon

Laboratories: AGH (Infolab. and Eklund Lab.)

Secretary: S. Fairclough

Support E-Mail: smr2234@ictp.it

Europe/Rome I consider the time evolution of observables in the transverse field Ising chain (TFIC) after a sudden quench of the magnetic field. I present exact analytical results for the asymptotic time and distance dependence of one- and two-point correlation functions of the order parameter. These results are based on two complementary approaches based on asymptotic evaluations of determinants and form-factor sums. I show that the stationary value of the two-point correlation function is not thermal, but can be described by a generalized Gibbs ensemble (GGE). The approach to the stationary state can also be understood in terms of a GGE. Generalizations to particular quenches in other integrable models are discussed. ICTP ICTP pio@ictp.it

Seminar

27 Apr 2011

@ ICTP

Condensed Matter and Statistical Physics

Joint ICTP/SISSA Colloquium on Condensed Matter Physics: "Quantum quench in the transverse field ising chain "

Address: Strada Costiera, 11 I - 34151 Trieste (Italy)

Room: Leonardo da Vinci Building Luigi Stasi Seminar Room

Speaker(s): Fabian ESSLER (Oxford University)

Seminar Start Time: 17:30

Europe/Rome The spectral unit ball of dimension n^2 is the set of all n\times n matrices having spectral radius less than 1. This object is of some prominence in linear control-theory circles because the Pick-Nevanlinna interpolation problem on it is very challenging. A first step in solving this problem would be to solve the 2-point problem, i.e. to produce a Schwarz lemma for the spectral unit ball. This is hard because the spectral unit ball is non-homogeneous when n>1, but there have been some recent results which we shall discuss. The complex geometry of the spectral unit ball in n^2 (n>1) is interesting because GL(n,C) acts non-trivially on it by conjugation. We shall discuss how this feature points to the prospect of a sharp Schwarz lemma. ICTP ICTP pio@ictp.it

Seminar

28 Apr 2011

@ ICTP

Mathematics

Towards a sharp Schwarz Lemma for the spectral unit ball

Address: Strada Costiera, 11 I - 34151 Trieste (Italy)

Room: Leonardo da Vinci Building Luigi Stasi Seminar Room

Speaker(s): Professor Gautam Bharali (Indian Institute of Science, Bangalore, India)

Support E-Mail: math@ictp.it

Seminar Start Time: 16:00

Europe/Rome Exciton-polaritons result from strong dipolar interaction between excitons in a semiconductor material and the electromagnetic field confined in the same volume by a photonic nanostructure. A polariton gas is a model system of a dissipative, ultra-light Bose gas in a solid state environment, which provides an easy and complete experimental access to the system observables. Thus, fascinating phenomena like polariton lasing [1], Bose-Einstein condensation [2] and more recently superfluidity [3] could be demonstrated and studied with a great wealth of details. Recently, owing to advances in the domain of semiconductor nanostructure fabrication, new interesting perspectives have emerged: the experimental realization and study of a new state of Bose gases will soon be possible, like low dimensional Bose gases (1D quasi-condensate [4], Tonks-Girardeau liquids [5]), as well as room temperature quantum degeneracy. In this presentation, the most recent experimental observations on polariton gases will be reviewed, and the future possible experimental realization with polariton condensates will be discussed. [1] L. S. Dang et al., Phys. Rev. Lett., 81, 3920 (1998) [2] J. Kasprzak et al., Nature 443, 409 (2006) [3] A. Amo et al., Nat Phys, 5, 805 (2009) [4] S. Richard et al., Phys. Rev. Lett., 91, 010405 (2003) [5] Kinoshita et al., Science, 305, 1125 (2004) ICTP ICTP pio@ictp.it

Seminar

28 Apr 2011

@ ICTP

Condensed Matter and Statistical Physics

Seminar on Disorder and strong electron correlations: "Exciton-polaritons: An ultra-light dissipative Bose gas with tunable dimensionality"

Address: Strada Costiera, 11 I - 34151 Trieste (Italy)

Room: Leonardo da Vinci Building Euler Lecture Hall

Speaker(s): Maxime RICHARD (Institut Néel, Grenoble )

Seminar Start Time: 16:00

Activity

2 May 2011 - 13 May 2011

@ Trieste - Italy

School and Conference on Mathematics and Physics of Soft and Biological Matter | (smr 2235)

Room: Leonardo da Vinci Building Main Lecture Hall

Organizer(s): Directors: Antonio DeSimone, Jean-Francois Joanny, Tom Lubensky, Sriram Ramaswamy; R. T. Ramakrishnan (Local Organiser)

Secretary: A. Bergamo

Support E-Mail: smr2235@ictp.it

Activity

@ Trieste - Italy

Condensed Matter and Statistical Physics

Workshop on Advanced Oxide Interfaces (9-12 May), followed by: ADGLASS General Meeting (13 May) | (smr 2236)

Room: Adriatico Guest House Giambiagi Lecture Hall

Organizer(s): Directors: L. Colombi-Ciacchi, A. De Vita, H. Röhl; Local Organizer: S. Scandolo

Laboratories: yes

Secretary: D. Sauleek

Cosponsor(s): in cooperation with and co-sponsored by:ADGLASS (EU Consortium for Glass Interfaces)

Support E-Mail: smr2236@ictp.it

Europe/Rome PURPOSE AND NATURE The purpose of the Conference is to provide training and information exchange on the use of nuclear and conventional techniques for enhancing more crops per drop. The lectures will include the basic principles of evapotranspiration and crop water use. Methods of calculating and measuring evapotranspiration and its partitioning into soil evaporation and crop transpiration, the two major sources of water losses from agricultural systems, will be presented. A quantitative framework for improving water use efficiency from field to area-wide scale will be discussed. Participants will have the opportunity to use FAO’s AquaCrop model to predict yield response to water under both rainfed and irrigated production systems. MAIN TOPICS • Soil water balance and evapotranspiration – methodology, estimation, evaporation pan, soil moisture measurement using neutron probe and other techniques. • Methods of calculating evaporation and transpiration –conventional techniques. • Separating transpiration (T) and evaporation (E) through isotopic and nuclear techniques: theory, methods and equipments. • Water use efficiency and crop water productivity calculation & data requirement. • Improving agricultural water productivity and enhancing crop water use efficiency using the FAO AquaCrop Model. • Case studies: soil water balance studies; the use of AquaCrop under different irrigation management. Trieste - Italy ICTP pio@ictp.it

Activity

9 May 2011 - 13 May 2011

@ Trieste - Italy

Joint ICTP-IAEA Conference on Coping with Climate Change and Variability in Agriculture through Minimizing Soil Evaporation Wastage and Enhancing More Crops per Drop | (smr 2237)

Room: Adriatico Guest House Denardo Lecture Hall

Organizer(s): IAEA: Lee Kheng HENG, Minh-Long NGUYEN; ICTP: Adrian TOMPKINS

Laboratories: EKLUND Lab. AGH

Secretary: N. van Buuren

Support E-Mail: smr2237@ictp.it

Europe/Rome Under certain conditions, the propagation of phonons in condensed matter systems and the propagation of light in general relativity are described by the same equation. However, while quantum phenomena like the emission of thermal radiation from black holes are hardly detectable, analogue systems can provide the unique possibility to experimentally test such effects. Originally driven by such motivation, the study of analogies between quantum field theory in curved space and condensed matter has now produced a fruitful interchange leading to new and deep insights in both fields. In particular Bose-Einstein Condesates are a very rich and powerful system in which this analogy can be implemented. I will give an overview on how various issues in the context of general relativity can be addressed through the analogy with BEC. Vice versa, techniques imported from general relativity can proficiently describe interesting phenomena in BEC, such as spontaneous phonon emission in flows crossing the speed of sound and resonant effects in system with multiple sonic points. SISSA, Room 129 1st Floor, Santorio Building ICTP pio@ictp.it

Seminar

10 May 2011

@ SISSA, Room 129 1st Floor, Santorio Building

Condensed Matter and Statistical Physics

JOINT ICTP/SISSA STATISTICAL PHYSICS SEMINAR: "Analogue Gravity in Bose--Einstein Condensates"

Speaker(s): Stefano FINAZZI (SISSA)

Seminar Start Time: 12:00

Europe/Rome This is the continuation of the seminars of Physics of the Living State (Applied Physics Scientific Section). You will be especially welcome if you are visiting the Centre, or another Trieste Institute, as Associate Members, TRIL Fellows, or if you are from Affiliated Institutes in the various areas of Applied Physics. The summary of the seminar will be available at: http://www.ictp.it/~chelaf/ss276.html Refreshments will be served at the end of this event. ICTP ICTP pio@ictp.it

Seminar

11 May 2011

@ ICTP

Applied Physics

Advanced X-ray Micro-tomography Techniques in Medical Research

Address: Strada Costiera, 11 I - 34151 Trieste (Italy)

Room: Leonardo da Vinci Building Oppenheimer Meeting Room

Speaker(s): Christian Dullin (University Medical Center Göttingen Department of Diagnostic Radiology Göttingen, Germany )

Support E-Mail: chelaf@ictp.it

Seminar Start Time: 16:30

Europe/Rome It is currently believed that the atlas of existing protein structures is faithfully represented in the Protein Data Bank. However, whether this atlas covers the full universe of all possible protein structures is still a highly debated issue. By using a sophisticated numerical approach, bias exchange metadynamics, we performed an exhaustive exploration of the conformational space of a 60 amino acid polypeptide chain described with an accurate all-atom interaction potential. We generated a database of around 30,000 compact folds with at least 30 % of secondary structure and corresponding to local minima of the potential energy. This ensemble plausibly represents the universe of protein folds of similar length; indeed, all the known folds are represented in the set with good accuracy, despite of the fact the simulation is performed for a homopeptide. However, we discover that the known folds form a rather small subset, which cannot be reproduced by choosing random structures in the database. Rather, natural and possible folds differ by the contact order, on average significantly smaller in the former. This suggests the presence of an evolutionary bias, possibly related to kinetic accessibility, towards structures with shorter loops between contacting residues. ICTP ICTP pio@ictp.it

Seminar

11 May 2011

@ ICTP

Condensed Matter and Statistical Physics

JOINT ICTP/SISSA COLLOQUIUM ON CONDENSED MATTER PHYSICS: "Exploring the universe of protein structures beyond the Protein Data Bank"

Address: Strada Costiera, 11 I - 34151 Trieste (Italy)

Room: Leonardo da Vinci Building Luigi Stasi Seminar Room

Speaker(s): Alessandro LAIO (SISSA)

Seminar Start Time: 17:30

Europe/Rome We discuss interaction effects in Dirac materials. In a first part I will discuss the role of interaction in graphene and manifestations of interactions in transport measurements in weakly interacting systems. For strong interactions for a concrete phenomenological model we will also discuss the quantum critical conductivity of graphene at a semimetal-to-insulator transition (breaking the chiral symmetry) and make connection to experiments conducted on suspended graphene samples. In a second part we discuss topological insulators and specifically the Dirac character of surface states. We argue that upon driving a bulk quantum phase transition surface states can be tuned in a way which might facilitate the observation of chiral symmetry breaking on the surface. ICTP ICTP pio@ictp.it

Seminar

12 May 2011

@ ICTP

Condensed Matter and Statistical Physics

SEMINAR on Disorder and Strong Correlations: "Interaction effects in Dirac systems: driving chiral symmetry breaking?"

Address: Strada Costiera, 11 I - 34151 Trieste (Italy)

Room: Leonardo da Vinci Building Luigi Stasi Seminar Room

Speaker(s): Lars FRITZ (University of Cologne)

Seminar Start Time: 12:30

Seminar

12 May 2011

@ ICTP

Mathematics

JOINT ICTP/SISSA GEOMETRIC ANALYSIS SEMINAR - Normalized Ricci flow on asymptotic hyperbolic manifolds

Address: Strada Costiera, 11 I - 34151 Trieste (Italy)

Room: Leonardo da Vinci Building Luigi Stasi Seminar Room

Speaker(s): Professor Yuguang Shi (Peking University, P.R. China)

Support E-Mail: math@ictp.it

Seminar Start Time: 16:00

Europe/Rome Abstract The new worldview that has emerged from inflationary cosmology suggests that distant parts of the universe are strikingly different from our local region. Most, if not all of these remote domains are beyond our cosmic horizon and cannot be directly observed. I will discuss the origin of the new worldview, the conceptual problems that it raised, and its possible observational tests. ICTP ICTP pio@ictp.it

Colloquium

12 May 2011

@ ICTP

The principle of mediocrity

Address: Strada Costiera, 11 I - 34151 Trieste (Italy)

Room: Leonardo da Vinci Building Main Lecture Hall

Speaker(s): Alexander Vilenkin (Director of the Institute of Cosmology - Tufts University)

Colloquium Start Time: 18:00

Seminar

13 May 2011

@ ICTP

Mathematics

MINI-WORKSHOP ON CIRCLE MAPS - Introduction to dynamics of circle homeomorphisms

Address: Strada Costiera, 11 I - 34151 Trieste (Italy)

Room: Leonardo da Vinci Building Luigi Stasi Seminar Room

Speaker(s): Konstantin Khanin (University of Toronto, Canada)

Support E-Mail: math@ictp.it

Seminar Start Time: 15:30

Seminar

13 May 2011

@ ICTP

Mathematics

MINI-WORKSHOP ON CIRCLE MAPS - Invariant measures for circle maps with breaks

Address: Strada Costiera, 11 I - 34151 Trieste (Italy)

Room: Leonardo da Vinci Building Luigi Stasi Seminar Room

Speaker(s): Akhtam Dzhalilov (Samarkand State University, Uzbekistan)

Support E-Mail: math@ictp.it

Seminar Start Time: 16:30

Seminar

13 May 2011

@ ICTP

Mathematics

MINI-WORKSHOP ON CIRCLE MAPS - Regularity of conjugacies between circle maps with breaks and rigid rotations

Address: Strada Costiera, 11 I - 34151 Trieste (Italy)

Speaker(s): Habib Marzougui (Universite' de Carthage, Bizerte, Tunisia)

Support E-Mail: math@ictp.it

Seminar Start Time: 17:30

Europe/Rome The overall objective of the proposed workshop is to enhance capacity of team from AAP member countries to undertake the setup of climate data server and associated software services in order to properly handling climate data. . The specific objectives will be to: - i. Train participant in installing and managing computational data servers. This is include hardware RAID configuration Operating System installation, backup/restore procedures alerts/alarms configurations ii. Train participants in using and installing and configuring appropriate software for climate data management Trieste - Italy ICTP pio@ictp.it

Activity

16 May 2011 - 27 May 2011

@ Trieste - Italy

New Research Areas

Joint AAP-ICTP Activity on Special Training for UNDP African Adaptation Programme on building and using data servers for adaptation studies | (smr 2323)

Director(s): Dr. C. Onime (ICTP, Trieste, Italy), Dr. Joseph Intsiful ( UNDP/AAP, Dakar, Senegal)

Organizer(s): Dr. C. Onime (ICTP, Trieste, Italy) and Dr. S. Cozzini (CNR/IOM Democritos, Italy)

Local organizer(s): S. Cozzini (CNR/IOM Democritos, Italy)

SEMINAR on Disorder and Strong Correlations: "Measurement backaction on adiabatic coherent electron transport"

Address: Strada Costiera, 11 I - 34151 Trieste (Italy)

Room: Leonardo da Vinci Building Luigi Stasi Seminar Room

Speaker(s): Stefan KEHREIN (LMU Munich)

Seminar Start Time: 12:30

Activity

23 May 2011 - 3 Jun 2011

@ Trieste - Italy

Earth System Physics

Advanced School on Scaling Laws in Geophysics: Mechanical and Thermal Processes in Geodynamics | (smr 2240)

Room: Adriatico Guest House Kastler Lecture Hall

Organizer(s): Directors: A. Aoudia, P. Molnar, G. Houseman, C. Jaupart, M. Manga

Laboratories: AGH (Infolab.)

Secretary: P. Wardell

Support E-Mail: smr2240@ictp.it

Activity

23 May 2011 - 27 May 2011

@ Trieste - Italy

Condensed Matter and Statistical Physics

Workshop on Integrability and its Breaking in Strongly Correlated and Disordered Systems | (smr 2239)

Room: Leonardo da Vinci Building Main Lecture Hall

Organizer(s): Organizers: T. Giamarchi, V. Gritsev, M. Mueller, G. Mussardo, A. Silva

Secretary: N. Ivanissevich

Support E-Mail: smr2239@ictp.it

Hosted Activity

23 May 2011 - 29 May 2011

@ Trieste - Italy

Seminario: A un passo dalla IPHO (Olimpiadi Internazionali della Fisica) | (smr H279)

Room: Adriatico Guest House Denardo Lecture Hall

Organizer(s): Associazione per l'Insegnamento della Fisica (Prof. Giuliana Cavaggioni)

Secretary: no ICTP

Europe/Rome The talk will stress the methods of positive operators by giving a brief survey of the scope of applications of the Krein-Rutman theorem with some of its recent variants. It is worth noticing that the Krein-Rutman theorem (as well as its linear or nonlinear variants) extend the well-known Perron-Frobenius theorem and is a fundamental tool in the study of positive eigenvalue problems with invaluable applications in Mathematical Analysis (e.g., Partial Differential Equations, Bifurcation Theory, Optimization, Order-preserving Dynamical Systems, Stability Theory). ICTP ICTP pio@ictp.it

Seminar

24 May 2011

@ ICTP

Mathematics

Positivity and principal eigenvalue problems with applications

Address: Strada Costiera, 11 I - 34151 Trieste (Italy)

Room: Leonardo da Vinci Building Luigi Stasi Seminar Room

Speaker(s): Dr. Guy Degla (IMSP-Benin and AUST-Nigeria)

Support E-Mail: math@ictp.it

Seminar Start Time: 15:30

Europe/Rome Abstract Where crust shortens horizontally and thickens, isostatic compensation of the thick crust requires that a mountain range or high plateau form. Yet, mantle lithosphere must also shorten horizontally, and if it thickens, it should provide a weight that maintains the range at a lower elevation than it would be if isostatic compensation resulted only from thickened crust. Being cold and dense, mantle lithosphere (or at least its lower part) should be convectively unstable, and hence should sink rapidly into the underying asthenosphere as downwelling sheets or plumes. Indeed, tomographic images of mountain ranges do not, in general, reveal a deep root of thickened mantle lithosphere, suggesting that some process removed it. Removal of mantle lithosphere should make the remaining lithosphere more buoyant, and when (if) mantle lithosphere is removed, the earth’s surface should rise. I exploit seismological images of upper mantle structure, numerical experiments of Rayleigh-Taylor instability (arising when a dense layer overlies a less dense one), and inferences of paleo-altimetry, among other geologic observations to argue that mantle lithosphere commonly is removed when mountain ranges are built, with unexpected consequences in some cases. I will use geological and geophysical data from Tibet, the Andes, the Tien Shan, etc. to illustrate apparent consequences of removal of mantle lithosphere. (Anyhow, if all of this interpretation proves to be nonsense, I hope to present interesting facts and well executed numerical experiments that others will find useful.) ICTP ICTP pio@ictp.it

Colloquium

25 May 2011

@ ICTP

Mantle dynamics and the rise and fall of mountain belts

Address: Strada Costiera, 11 I - 34151 Trieste (Italy)

Room: Leonardo da Vinci Building Main Lecture Hall

Speaker(s): Peter Molnar (University of Colorado at Boulder)

Colloquium Start Time: 17:30

Seminar

26 May 2011

@ ICTP

Mathematics

Balanced metrics on Kahler manifolds

Address: Strada Costiera, 11 I - 34151 Trieste (Italy)

Room: Leonardo da Vinci Building Luigi Stasi Seminar Room

Speaker(s): Prof. Andrea Loi (The University of Cagliari, Italy)

* ACTIVITY CANCELLED *

Seminar Start Time: 16:00

Europe/Rome The objective of this scientific workshop is to present 'CLEW assessment methods' for analysing the interaction of climate (C), land (L), energy (E) and water (W) resources and services as well as showing the implications of these interactions on the socio-economic development of society via case studies. The analysis of individual CLEW components (and their related services) is routinely undertaken using modelling tools. However these models often lack the functionality required to conduct the integrated analysis required in developing climate-impact, land-, energy- and water-use related policies. The development of an integrated tool linking the above components would help policy makers assess different technologies, estimate the impact of different development scenarios, coordinate policy and planning activities related to water, energy, land and climate and analyse and evaluate policies. Trieste - Italy ICTP pio@ictp.it

Activity

30 May 2011 - 3 Jun 2011

@ Trieste - Italy

Earth System Physics

Joint ICTP-IAEA Workshop on Uncovering Sustainable Development CLEWS; Modelling Climate, Land-use, Energy and Water (CLEW) Interactions | (smr 2242)

Room: Adriatico Guest House Giambiagi Lecture Hall

Organizer(s): IAEA: M. Howells, M. Nguyen and B. Newman. ICTP: F. Giorgi

Laboratories: Yes, wireless internet capacity. Eklund Infolab

Secretary: S. Henningsen

Support E-Mail: smr2242@ictp.it

Hosted Activity

30 May 2011 - 1 Jun 2011

@ Trieste - Italy

US-NAS (National Academy of Sciences) Planning Workshop on Responsible Conduct of Science | (smr H281)

Room: Adriatico Guest House Giambiagi Lecture Hall

Organizer(s): US-NAS and TWAS

Secretary: A. Coppola

Europe/Rome The phase of the optical beam around a point (or a line) where the intensity is zero is undefined. This point is called phase singular point and the research field, which deals with the beam character around this point, is named singular optics. Different types of singularities have been studied in the literature. In recent years, a special type of singularity named optical vortex received particular attention. A beam having such a singularity at its axis carries a well-defined value of the orbital angular momentum. The main aim of the workshop is application of the optical vortex in the different physics research fields such as: 1- Generation and manipulation of optical vortices 2- Imaging from micro- to astronomical-systems 3- Optical tweezers 4- Quantum information 5- Random optical vortices and beam patterns 6- Vortices in quantum turbulence 7- BEC and exciton-polariton condensates 8- Liquid crystals Trieste - Italy ICTP pio@ictp.it

Activity

30 May 2011 - 3 Jun 2011

@ Trieste - Italy

Applied Physics

Workshop on Singular Optics and its Applications to Modern Physics | (smr 2241)

Room: Leonardo da Vinci Building Euler Lecture Hall

Organizer(s): Directors: Ebrahim Karimi; Joseph Niemela (Local Organiser)

Laboratories: not needed

Secretary: R. del Rio

Support E-Mail: smr2241@ictp.it

Europe/Rome Abstract: A Calabi-Yau manifold is a compact Kahler manifold with vanishing first Chern class. Yau's solution of the Calabi Conjecture implies that Calabi-Yau manifolds admit Ricci-flat Kahler metrics, which in most cases are not explicit. We will address the problem of understanding how these Ricci-flat metrics can degenerate, when the complex structure is fixed. ICTP ICTP pio@ictp.it

Seminar

3 Jun 2011

@ ICTP

Mathematics

"How do Calabi-Yau manifolds degenerate?"

Address: Strada Costiera, 11 I - 34151 Trieste (Italy)

Room: Leonardo da Vinci Building Luigi Stasi Seminar Room

Speaker(s): Prof. Valentino Tosatti (Columbia University, New York, NY, USA)

Support E-Mail: math@ictp.it

Seminar Start Time: 11:00

Europe/Rome Abstract: We describe moduli spaces of semi-stable vector bundles on non-Kaehler elliptic complex surfaces and on non-Kaehler principal elliptic bundles, which are Calabi-Yau type 3-folds. The main technical tools used are twisted Fourier-Mukai transform and a spectral cover construction. (Joint works with R. Moraru, A. Halaney and G. Trautmann). ICTP ICTP pio@ictp.it

Seminar

3 Jun 2011

@ ICTP

Mathematics

Vector bundles over elliptic fibrations

Address: Strada Costiera, 11 I - 34151 Trieste (Italy)

Room: Leonardo da Vinci Building Luigi Stasi Seminar Room

Speaker(s): Prof. Vasile Brinzanescu (Institute of Mathematics 'Simion Stoilow', Bucharest, Romania)

Seminar Start Time: 15:30

Hosted Activity

Speaker(s): Emmanuel A. Ariyibi (Department of Physics, Obafemi Awolowo University, Ile –Ife, Nigeria )

Support E-Mail: chelaf@ictp.it

Seminar Start Time: 16:30

Activity

13 Jun 2011 - 18 Jun 2011

@ Trieste - Italy

New Research Areas

Joint ICTP-IAEA Advanced School on the Role of Nuclear Technology in Hydrogen-Based Energy Systems | (smr 2245)

Room: Adriatico Guest House Giambiagi Lecture Hall

Organizer(s): IAEA: A. Zeman, I. Khamis, M. Haji-Saeid. ICTP: R. Gebauer

Laboratories: AGH (Infolab.)

Secretary: G. De Meo

Support E-Mail: smr2245@ictp.it

Europe/Rome Abstract: I'll explain how to define the curvature of variational problems including those with nonholonomic constraints. Classical Riemannian curvature comes as a very special case. I'll give more details and some applications for the 3D sub Riemannian problem that is the length minimization problem on the space of Legendrian curves on a contact manifold. ICTP ICTP pio@ictp.it

Seminar

14 Jun 2011

@ ICTP

Mathematics

The curvature revisited

Address: Strada Costiera, 11 I - 34151 Trieste (Italy)

Room: Leonardo da Vinci Building Luigi Stasi Seminar Room

Speaker(s): Prof. Andrei Agrachev (SISSA-ISAS, Trieste - Italy)

Seminar Start Time: 15:30

Seminar

16 Jun 2011

@ ICTP

High Energy Cosmology and Astroparticle Physics , Strings and Higher Dimensional Theories

Holographic Quantum Hall Effect

Address: Strada Costiera, 11 I - 34151 Trieste (Italy)

Room: Leonardo da Vinci Building Euler Lecture Hall

Speaker(s): Matti JARVINEN (University of Crete, Greece)

Seminar Start Time: 17:30

Europe/Rome Configuration spaces of some quantum integrable systems with singular interactions can be determined by analysing the nature of such singularity. In this talk, we discuss how the interactions of spin Sutherland model associated with the D_N type of root system lead to a Weyl-invariant configuration space, which is a N-dimensional generalization of the rhombic dodecahedron. Imposing periodic boundary condition on this nontrivial configuration space, we derive the spectrum of spin Sutherland model of D_N type. Applying the freezing trick, subsequently we obtain an exact expression for the partition function of the related Haldane-Shastry type spin chain. References: BBM, Artemio González-López and Federico Finkel, Nucl. Phys. B 843 (2011) 505 and Nucl. Phys. B 812 (2009) 402. ICTP ICTP pio@ictp.it

Seminar

17 Jun 2011

@ ICTP

Condensed Matter and Statistical Physics

Informal seminar on Statistical Physics: "Periodic boundary condition for a quantum integrable system with non-cubical configuration space"

Address: Strada Costiera, 11 I - 34151 Trieste (Italy)

Room: Leonardo da Vinci Building Luigi Stasi Seminar Room

Speaker(s): B. BASU-MALLICK (Saha Institute of Nuclear Physics, Kolkata )

Seminar Start Time: 12:30

Europe/Rome The goal of the Workshop is in-depth discussions of all substantial aspects of the production, propagation and detection of the high energy cosmic neutrinos. That includes analysis of the latest experimental results, models of neutrino sources and predictions of the neutrino fluxes. New ideas on cosmic neutrino detection and long term perspectives of the field will be considered. Topics: - Recent results on cosmic rays - Sources of cosmic rays and cosmic neutrinos - Gamma rays; neutrino-gamma connections - Experimental searches for neutrino sources and fluxes - Galactic and extragalactic sources of neutrinos - Cosmogenic neutrinos - Propagation and flavor transitions of cosmic neutrinos - Cosmic neutrinos and new physics - New experiments and projects Trieste - Italy ICTP pio@ictp.it

Activity

20 Jun 2011 - 24 Jun 2011

@ Trieste - Italy

High Energy Cosmology and Astroparticle Physics

Workshop on Cosmic Rays and Cosmic Neutrinos: Looking at the Neutrino Sky | (smr 2246)

Room: Adriatico Guest House Kastler Lecture Hall

Organizer(s): Directors: Alexei Smirnov, Paolo Lipari, Subir Sarkar, Thomas J. Weiler

Laboratories: none

Secretary: R. Sain

Cosponsor(s): The Italian Institute for Nuclear Research (INFN)

Support E-Mail: smr2246@ictp.it

Activity

20 Jun 2011 - 8 Jul 2011

@ Trieste - Italy

Mathematics

School and Conference on Computational Methods in Dynamics | (smr 2247)

Room: Leonardo da Vinci Building Main Lecture Hall

Organizer(s): Directors: John Guckenheimer, Carles Simó, Warwick Tucker. Local Organiser: Stefano Luzzatto

Laboratories: yes

Secretary: K. Mabilo

Support E-Mail: smr2247@ictp.it

Activity

20 Jun 2011 - 24 Jun 2011

@ Nairobi - Kenya

Earth System Physics

Joint ICTP-TWAS Workshop on Regional Climate Change and Impacts Modeling for Critical Assessment and Adaptation Strategies in Agriculture and Water Sectors over the Horn of Africa | (smr 2278)

Organizer(s): Directors: R. Anyah, A. Zakey, L. Ogallo, F. Giorgi

Secretary: G. De Meo

Support E-Mail: smr2278@ictp.it

Europe/Rome Recently, we have applied the computational condensed matter physics in liquid-liquid interface, liquid-solid interface and the three phase systems, which we know little in comparison with the bulk condensed matter materials & their surfaces, and are important for earth, energy and environment systems. Of particular, I’ll present three topics, which are relevant to sedimentary Methane Hydrate (MH), CO2 Storage and Sequestration (CCS) and Enhanced Oil Recovery (EOR), respectively. (1) We have performed molecular dynamics simulations in order to investigate the stability of CH4- and CO2- hydrate. It was found that the cage occupancy of hydrates influences the stability of the hydrates. More importantly, the actual three phase coexistence line of CO2 hydrate may be higher than the value ever measured. Our results show that the “lowered” three phase coexistence line stemmed from the partial occupancy occurred during the lab measurements. (2) We have investigated the contact angle of CO2/water/silica for two different silica surfaces by using large scale molecular dynamics simulations. It was found that the contact angle increases with pressure for hydrophobic (siloxane) surface while almost constant for the hydrophilic (silanol) surface, which is in excellent agreement with experimental observations. The difference results from the different interactions between the CO2 thin film and silica surfaces. (3) By using first-principle molecular dynamics, we have studied the interface of new cleaved quartz (0001) surface against liquid water at room temperature. It was found that the quartz surface is not saturated as ideal geminal [Si-(OH)2] surface for all calculations. The rest Si-O* radicals, presumably negatively charged, may help us solve a long-existing mystery in colloid and interface sciences, that the silica surface is negatively charged at PH=7. In collaboration with Yohei Mikami, Shinya Tsuji, Mia Ledyastuti, Makoto Kunieda and Toshifumi Matsuoka. ICTP ICTP pio@ictp.it

Seminar

20 Jun 2011

@ ICTP

Condensed Matter and Statistical Physics

Informal seminar on Chemical Physics: "Classical and quantum simulations in earth, energy and environment systems"

Address: Strada Costiera, 11 I - 34151 Trieste (Italy)

Room: Leonardo da Vinci Building Luigi Stasi Seminar Room

Speaker(s): Yunfeng LIANG (Kyoto University)

Seminar Start Time: 12:00

Seminar

22 Jun 2011

@ ICTP

High Energy Cosmology and Astroparticle Physics , Strings and Higher Dimensional Theories

Topological Quantization of Free Massive Bosonic Field

Address: Strada Costiera, 11 I - 34151 Trieste (Italy)

Room: Leonardo da Vinci Building Luigi Stasi Seminar Room

Speaker(s): Gustavo ARCINIEGA (Universidad Nacional Autonoma de Mexico)

Seminar Start Time: 12:00

Europe/Rome The year 2011 marks the 100th year anniversary of the discovery of superconductivity by Kammerlingh Onnes. Since then, superconductivity of simple metals, such as Al, Sn, and Hg, was explained by the BCS theory more than 50 years ago. The BCS theory has several key features: (a) pairing mediated by phonons; (b) energy scale of condensing charges, i.e., Fermi energy E_F, being much larger than that of mediating fluctuations hw_B (phonon frequency); (c) the transition temperature Tc scales with hw_B without directly depending on the carrier density. During recent 30 years, several new superconductors have been discovered: they include high- Tc cuprates, organic BEDT, alkali-doped A3C60, heavy-fermion, and FeAs superconductors which were discovered about three years ago. These systems are much different from BCS superconductors in: (a) pairing seems to be mediated by the spin fluctuations rather than lattice vibrations; (b) effective energy scales of superconducting charges are comparable with energy scales of spin fluctuations, indicating non-retarded interaction; and (c) the transition temperature scales with the superfluid density n_s/m* which represents the charge energy, suggesting relevance of Bose-Einstein condensation of pre-formed pairs. In this talk, I will demonstrate striking commonalities of these new unconventional superconductors by showing accumulated experimental results on energy scales and phase diagrams from muon spin relaxation (MuSR), neutron scattering, specific heat, and other measurements, and discuss their implications on pairing and condensation mechanisms. Especially, I will elucidate important roles of collective soft modes relevant to competing states in determining Tc, and advantage of possible resonance of the two key energy scales, E_F, for charges and hw_B for spins, in the process of crossover from Bose Einstein to BCS condensation for the pairing mediated by spin fluctuations. References: Y.J. Uemura, Nature Materials 8 (2009) 253-255. Y.J. Uemura, Physica B404 (2009) 3195-3201. ICTP ICTP pio@ictp.it

Seminar

22 Jun 2011

@ ICTP

Condensed Matter and Statistical Physics

Joint ICTP/SISSA Colloquium on Condensed Matter Physics: "Commonality and novelty of unconventional superconductors: CuO, FeAs, C60, organic and heavy-fermion systems"

Address: Strada Costiera, 11 I - 34151 Trieste (Italy)

Room: Leonardo da Vinci Building Luigi Stasi Seminar Room

Speaker(s): Yasutomo J. UEMURA (Columbia University, New York )

Seminar Start Time: 17:00

Seminar

24 Jun 2011

@ ICTP

Condensed Matter and Statistical Physics

Variational methods for strongly indefinite problems

Address: Strada Costiera, 11 I - 34151 Trieste (Italy)

Room: Leonardo da Vinci Building Luigi Stasi Seminar Room

Speaker(s): Professor Yanheng Ding (Chinese Academy of Science, Beijing, People's Republic of China)

Support E-Mail: math@ictp.it

Seminar Start Time: 15:30

Seminar

24 Jun 2011

@ ICTP

Condensed Matter and Statistical Physics

On a fourth-order elliptic problem without the Palais-smale condition

Address: Strada Costiera, 11 I - 34151 Trieste (Italy)

Room: Leonardo da Vinci Building Luigi Stasi Seminar Room

Speaker(s): Professor Abdellaziz Harrabi (Institut de Mathématiques Appliquées et Informatique, Kairouan, Tunisia)

Support E-Mail: math@ictp.it

Seminar Start Time: 17:00

Hosted Activity

25 Jun 2011

@ Trieste - Italy

First Meeting of the Standing Scientific Committee, UE Project, KM3NET-PP | (smr H285)

Room: Adriatico Guest House Lundqvist Lecture Hall

Organizer(s): Prof. Alessandro Bettini, University of Padova, Italy

Secretary: NoICTP

Activity

27 Jun 2011 - 8 Jul 2011

@ Trieste - Italy

Condensed Matter and Statistical Physics

Workshop and School on Topological Aspects of Condensed Matter Physics | (smr 2248)

Room: Leonardo da Vinci Building Main Lecture Hall

Organizer(s): Directors: C. Kane, A.W.W. Ludwig, P.B. Wiegmann, M. Zahid Hasan; V. Kravtsov (Local Organiser)

Laboratories: none

Secretary: M. de Comelli

Cosponsor(s): ICAM-12CAM Institute for Complex Adaptive Matter, Davis, CA, USA

Support E-Mail: smr2248@ictp.it

Activity

27 Jun 2011 - 1 Jul 2011

@ Trieste - Italy

Applied Physics

Joint ICTP-IAEA Course on Science and Technology of Supercritical Water Cooled Reactors | (smr 2291)

Organizer(s): IAEA: Katsumi Yamada; ICTP Local Organizer: C. Tuniz

Laboratories: AGH (Infolab.)

Secretary: S. Tanaskovic

Support E-Mail: smr2291@ictp.it

Online Application Form

Seminar

27 Jun 2011

@ ICTP

Mathematics

MATHEMATICS INFORMAL SEMINAR - Hermite-Einstein metrics on vector bundles

Address: Strada Costiera, 11 I - 34151 Trieste (Italy)

Room: Leonardo da Vinci Building Luigi Stasi Seminar Room

Speaker(s): Riccardo Lena (SISSA)

Support E-Mail: math@ictp.it

Seminar Start Time: 15:30

Europe/Rome The concept of symmetry has played a fundamental role in many of the advances of theoretical physics over the last century. In the physics of complex networks, symmetry also plays an important role. This talk will explore one way that symmetry can be used in Network Science. It will consider Boolean networks, which are simple models of genetic regulatory systems, as well as of a variety of physical, social, and economic systems. They consist of a directed graph with nodes that have binary output states that are heterogeneous functions of the binary input they receive. Each node receives input only from the nodes connected to it by the in‐links of the graph. In general there is a symmetry associated with the dynamics Boolean networks, and different dynamics are characterized by different symmetries. Furthermore, if the networks are evolving then they reflect the symmetry of their evolutionary dynamics. Computer simulations, analytic statistical mechanics, and group theoretic methods will be used to identify the symmetry and to use the results to distinguish various network dynamics. Important symmetry groups will be identified. These groups include the canalization preserving group. Canalization is a form of network robustness that is important for developmental biological systems. Recent advances in direct construction methods for sampling graphs with arbitrary given degree sequence and the discovery of graphicality transitions in scale‐free networks will also be discussed. ICTP ICTP pio@ictp.it

Seminar

28 Jun 2011

@ ICTP

Condensed Matter and Statistical Physics

Informal seminar on statistical physics: "Symmetry and the dynamics and evolution of Boolean networks"

Address: Strada Costiera, 11 I - 34151 Trieste (Italy)

Room: Leonardo da Vinci Building Luigi Stasi Seminar Room

Speaker(s): Kevin E. BASSLER (University of Houston )

Seminar Start Time: 12:30

Seminar

28 Jun 2011

@ ICTP

Mathematics

Twisted doubles and nonpositive curvature

Address: Strada Costiera, 11 I - 34151 Trieste (Italy)

Some Issues in Supersymmetry Breaking

Address: Strada Costiera, 11 I - 34151 Trieste (Italy)

Room: Leonardo da Vinci Building Luigi Stasi Seminar Room

Speaker(s): Senarath de ALWIS (University of Colorado, USA)

Seminar Start Time: 12:00

Europe/Rome This is the continuation of the seminars of Physics of the Living State (Applied Physics Scientific Section). You will be especially welcome if you are visiting the Centre, or another Trieste Institute, as Associate Members, TRIL Fellows, or if you are from Affiliated Institutes in the various areas of Applied Physics. The summary of the seminar will be available at: http://www.ictp.it/~chelaf/ss278.html Refreshments will be served at the end of this event. ICTP ICTP pio@ictp.it

Seminar

29 Jun 2011

@ ICTP

Applied Physics

Polymorphic Dynamics of Microtubules

Address: Strada Costiera, 11 I - 34151 Trieste (Italy)

Room: Leonardo da Vinci Building Oppenheimer Meeting Room

Speaker(s): Herve Mohrbach (ICPM, University Paul Verlaine, Metz, France )

Support E-Mail: chelaf@ictp.it

Seminar Start Time: 16:30

Colloquium

29 Jun 2011

@ ICTP

Address: Strada Costiera, 11 I - 34151 Trieste (Italy)

Room: Leonardo da Vinci Building Luigi Stasi Seminar Room

Speaker(s): Professor Niels Lauritzen (University of Aarhus, Denmark)

Support E-Mail: math@ictp.it

Seminar Start Time: 15:30

Europe/Rome The quantification of the complexity of networks is, today, a fundamental problem in the physics of complex systems. A possible roadmap to solve the problem is via extending key concepts of information theory to networks. In this talk we discuss recent works defining the Shannon entropy of a network ensemble and evaluating how it relates to the Gibbs and von Neumann entropies of network ensembles. The quantities we introduce here play a crucial role for the formulation of null models of networks through maximum-entropy arguments and contribute to inference problems emerging in the field of complex networks. ICTP ICTP pio@ictp.it

Seminar

6 Jul 2011

@ ICTP

Condensed Matter and Statistical Physics

Informal seminar on Statistical Physics: "Entropy of network ensembles"

Address: Strada Costiera, 11 I - 34151 Trieste (Italy)

Room: Leonardo da Vinci Building Euler Lecture Hall

Speaker(s): Ginestra BIANCONI (Northeastern University, Boston )

Seminar Start Time: 12:00

Seminar

7 Jul 2011

@ ICTP

High Energy Cosmology and Astroparticle Physics , Phenomenology of Particle Physics

Grand Unification Upended

Address: Strada Costiera, 11 I - 34151 Trieste (Italy)

Room: Leonardo da Vinci Building Euler Lecture Hall

Speaker(s): Charanjit S. AULAKH (Panjab University, India)

Seminar Start Time: 17:30

Activity

11 Jul 2011 - 15 Jul 2011

@ Trieste - Italy

Condensed Matter and Statistical Physics

Fifth Stig Lundqvist Conference on the Advancing Frontiers of Condensed Matter Physics | (smr 2249)

Room: Adriatico Guest House Kastler Lecture Hall

Organizer(s): Directors: Gene Mele, Aron Pinczuk; Erio Tosatti (Local Organiser)

Laboratories: none

Secretary: M. de Comelli

Cosponsor(s): ICAM-12CAM Institute for Complex Adaptive Matter, Davis, CA, USA

Support E-Mail: smr2249@ictp.it

Europe/Rome The aim of this activity is to comprehensively review current understanding of the nature and theory of the general circulation of the atmosphere and oceans on a wide range of space and time scales. The School will concentrate on both fundamental theories of the circulations, as well as on understanding and using the wealth of modern observational and reanalysis data sets of the atmosphere and oceans. The Conference will highlight current research questions on the mean and variability of the general circulation. Recent efforts at reanalysis of the atmosphere and oceans at a number of institutions around the world has allowed for the incorporation of both historical and modern observational data sets into the predictive framework of state-of-the-art numerical models. The multiplicity of these efforts can be used to better understand what is known firmly about the variability of the climate system (on time scales from hourly to centennial) and what is still unknown. This will be the focus of the Conference. Research topics and questions of interest may include: • Quantitative examination of the mass, salt, and heat transports that maintain the ocean mean state through the horizontal and overturning circulation processes • Understanding of the relationship of the ocean circulation to the surface momentum, heat, and freshwater exchange with the atmosphere. • To what extent can we assess the vertical structures of the atmospheric tropical circulation, particularly the relationships with diabatic heating? • New diagnostics for the analysis of extratropical circulation based on isentropic and potential vorticity coordinates; application to high-resolution simulations. • What is the nature of the “background” (i.e. beyond the Madden-Julian Oscillation) planetary wave variability in the tropics? • What are the causes of the mid-winter suppression of baroclinic instability in the Northern Hemisphere? Students in the School will benefit from “hands-on” training in diagnosis of the reanalysis, formulation of research hypotheses, and comparison to modern theories. They will have a unique opportunity to access multiple large reanalysis data sets, and to learn how the global circulation interacts with regional climate and weather of local practical concern. Trieste - Italy ICTP pio@ictp.it

Activity

11 Jul 2011 - 15 Jul 2011

@ Trieste - Italy

Earth System Physics

School and Conference: The General Circulation of the Atmosphere and Oceans: A Modern Perspective | (smr 2250)

Room: Leonardo da Vinci Building Main Lecture Hall

Organizer(s): Directors: D. Straus, F. Molteni, F. Kucharski, J. Shukla

Laboratories: AGH (Infolab.)

Secretary: L. Iannitti

Support E-Mail: smr2250@ictp.it

Europe/Rome We first give a brief introduction to the notion of versal torsor and essential dimension of "algebraic structure". Then we will discuss about certain versal torsors, their essential dimensions and related cohomological invariants. ICTP ICTP pio@ictp.it

Seminar

12 Jul 2011

@ ICTP

Mathematics

ALGEBRAIC GEOMETRY SEMINARS - On versal torsors and related invariants.

Address: Strada Costiera, 11 I - 34151 Trieste (Italy)

Room: Leonardo da Vinci Building Luigi Stasi Seminar Room

Speaker(s): Dr. Bayarmagnai Gombodorj

Support E-Mail: math@ictp.it

Seminar Start Time: 15:30

Seminar

12 Jul 2011

@ ICTP

High Energy Cosmology and Astroparticle Physics , Strings and Higher Dimensional Theories

Room: Leonardo da Vinci Building Luigi Stasi Seminar Room

Speaker(s): Cristian MICHELETTI (SISSA, Trieste)

Seminar Start Time: 17:30

Europe/Rome Abstract: The emergence of patterns is one of the world’s most durable mysteries. Some patterns (clouds, zebra stripes) form in space, while others (the ebb and flow of tides, cardiac rhythms) form in time. Although there is no general theory of pattern formation in systems far from thermodynamic equilibrium, new analysis techniques enable quantitative comparisons of patterns such as the spirals in a frog egg, a fibrillating heart, and an ocean eddy. Insight into pattern formation in diverse systems of different sizes and different underlying mechanisms can be gained from a common approach, as will be illustrated with examples from chemistry, physics, and biology. ICTP ICTP pio@ictp.it

Colloquium

14 Jul 2011

@ ICTP

Emergence of order in physical, chemical, and biological systems

Address: Strada Costiera, 11 I - 34151 Trieste (Italy)

Room: Leonardo da Vinci Building Main Lecture Hall

Speaker(s): Harry L. Swinney (University of Texas at Austin)

Colloquium Start Time: 17:30

Europe/Rome Recently developed free-energy methods (steered molecular dynamics, well-tempered metadynamics, parallel tempering and solute tempering) will be discussed, and their application to the folding of small proteins and RNA molecules will be shown. Using these techniques, a proposed model for RNA unwinding is validated and interpreted at atomistic resolution. ICTP ICTP pio@ictp.it

Seminar

15 Jul 2011

@ ICTP

Condensed Matter and Statistical Physics

Informal seminar on Statistical Physics: "Accelerated sampling of the conformational space in biomolecules: From small proteins to RNAs"

Address: Strada Costiera, 11 I - 34151 Trieste (Italy)

Room: Leonardo da Vinci Building Luigi Stasi Seminar Room

Speaker(s): Giovanni BUSSI (SISSA, Trieste)

Seminar Start Time: 17:00

Activity

18 Jul 2011 - 22 Jul 2011

@ Trieste - Italy

Condensed Matter and Statistical Physics

Advanced Workshop on Non-Standard Superfluids and Insulators | (smr 2252)

Room: Adriatico Guest House Kastler Lecture Hall

Organizer(s): Directors: B.L. Altshuler, I. Bloch, M.N. Kiselev, N.V. Prokof'ev, P. Weichman

Laboratories: none

Secretary: N. Ivanissevich

Support E-Mail: smr2252@ictp.it

Activity

18 Jul 2011 - 22 Jul 2011

@ Trieste - Italy

Earth System Physics

Workshop on Hierarchical Modeling of Climate | (smr 2251)

Organizer(s): Directors: Adam Sobel, In-Sik Kang, Fred Kucharski, Ricardo Farneti

Laboratories: AGH (Infolab.)

Secretary: L. Iannitti

Support E-Mail: smr2251@ictp.it

Europe/Rome Many of the biological networks inside cells can be thought of as transmitting information from the inputs (e.g., the concentrations of transcription factors or other signaling molecules) to their outputs (e.g., the expression levels of various genes). On the molecular level, the relatively small concentrations of the relevant molecules and the intrinsic randomness of chemical reactions provide sources of noise that set physical limits on this information transmission. Given these limits, not all networks perform equally well, and maximizing information transmission provides a optimization principle from which we might hope to derive the properties of real regulatory networks. Inspired by the precision of transmission of positional information in the early development of the fly embryo, I will discuss the properties of specific small networks that can transmit the maximum information. Concretely, I will show how the form of molecular noise drives predictions not just of the qualitative network topology but also the quantitative parameters for the input/output relations at the nodes of the network. I will show how the molecular details of regulation change the networks ability to transmit information. ICTP ICTP pio@ictp.it

Seminar

18 Jul 2011

@ ICTP

Condensed Matter and Statistical Physics

Address: Strada Costiera, 11 I - 34151 Trieste (Italy)

Room: Leonardo da Vinci Building Luigi Stasi Seminar Room

Speaker(s): Dr. Sikimeti Ma'u (MSRI, Berkeley, USA)

Support E-Mail: math@ictp.it

Seminar Start Time: 15:30

Europe/Rome This is the continuation of the seminars of Physics of the Living State (Applied Physics Scientific Section). You will be especially welcome if you are visiting the Centre, or another Trieste Institute, as Associate Members, TRIL Fellows, or if you are from Affiliated Institutes in the various areas of Applied Physics. The summary of the seminar will be available at: http://www.ictp.it/~chelaf/ss280.html Refreshments will be served at the end of this event. ICTP ICTP pio@ictp.it

Seminar

19 Jul 2011

@ ICTP

Applied Physics

A New Member of the Astrobiology Community

Address: Strada Costiera, 11 I - 34151 Trieste (Italy)

Room: Leonardo da Vinci Building Oppenheimer Meeting Room

Speaker(s): Jorge Bueno (Instituto de Astrobiologia de Colombia (IAC))

Support E-Mail: chelaf@ictp.it

Seminar Start Time: 16:30

Europe/Rome Molecule concentrations are the building blocks of information transmission in living organisms. Thanks to their molecule receptors, cells are able to sense concentration gradients with high accuracy. For example, small motile bacteria such as E. coli detect spatial gradients indirectly by measuring concentration ramps (temporal concentration changes) as they swim, and can respond to concentrations as low as 3.2 nM - about three molecules per cell volume. The noise arising from the small number of detected molecules sets a fundamental physical limit on the accuracy of concentration sensing, as originally shown in the seminal work of Berg and Purcell, but up to now no theory existed for the physical limit of ramp sensing, which is what bacteria actually do. I will show how such a bound can be derived for different measurement devices, from a single receptor to an entire cell. I will then present a plausible implementation of that bound by a realistic (bio)chemical network, similar to the adaptation system of E. coli. Finally I will show how energy consumption at the level of the receptors can be used to increase the accuracy by a twofold factor over a passive scheme where no energy is consumed. ICTP ICTP pio@ictp.it

Seminar

20 Jul 2011

@ ICTP

Condensed Matter and Statistical Physics

Informal seminar on Statistical Physics: "How cells can improve their sensitivity to concentration changes"

Address: Strada Costiera, 11 I - 34151 Trieste (Italy)

Room: Leonardo da Vinci Building Luigi Stasi Seminar Room

Speaker(s): Thierry MORA (Ecole Normale Supérieure, Paris )

Seminar Start Time: 17:30

Europe/Rome Abstract: Magnetars are maximum stars. They carry the highest magnetic fields and emit the most energetic flares recorded. They have many other distinctive and puzzling features that defy explanation. We consider a model where the strong magnetic fields of magnetars arise from a high baryon density, magnetized core. In this framework magnetars are distinguished from pulsars by their higher masses and central density. For magnetars, as core densities exceed a threshold, the strong interaction induces a phase transition to a neutral pion condensate that aligns all magnetic moments. The core magnetic field is initially shielded by the ambient high conductivity plasma. With time the shielding currents dissipate transporting the core field out, first to the crust and then breaking through the crust to the surface of the star. Recent observations provide strong support for this model which accounts for several properties of magnetars and also and also enables us to identify new magnetars. ICTP ICTP pio@ictp.it

Seminar

21 Jul 2011

@ ICTP

High Energy Cosmology and Astroparticle Physics

Magnetars: Maximum Stars Unravelling the Puzzle

Address: Strada Costiera, 11 I - 34151 Trieste (Italy)

Room: Leonardo da Vinci Building Euler Lecture Hall

Speaker(s): Vikram SONI (National Physical Laboratory, New Delhi, India)

Seminar Start Time: 17:30

Europe/Rome I am going to describe a decomposition of a germ of a complex algebraic surface near an isolated singular point, such that this decomposition gives a complete invariant of this germ with respect to local bi-Lipschitz homeomorphisms. This decomposition is related to JSJ Decomposition of the link of this singularity, considered as a smooth 3-manifold. The construction uses the carousel decomposition of neighborhoods of complex algebraic curves, constructed by Le Dung Trang. It is a joint work with Walter Neumann and Anne Pichon. ICTP ICTP pio@ictp.it

Seminar

22 Jul 2011

@ ICTP

Mathematics

Metric Geometry and Topology of Complex Surface Singularities

Address: Strada Costiera, 11 I - 34151 Trieste (Italy)

Room: Leonardo da Vinci Building Luigi Stasi Seminar Room

Speaker(s): Dr. Lev Birbrair (Universidade Federal do Ceara', Fortaleza, Brazil)

Support E-Mail: math@ictp.it

Seminar Start Time: 15:30

Activity

24 Jul 2011 - 29 Jul 2011

@ Trieste - Italy

Condensed Matter and Statistical Physics

Workshop on Synergies between Field Theory and Exact Computational Methods in Strongly Correlated Quantum Matter | (smr 2253)

Room: Leonardo da Vinci Building Main Lecture Hall

Organizer(s): Directors: R. Kaul, A. Sandvik, M. Vojta; M. Mueller (Local Organiser)

Laboratories: none

Secretary: F. Delconte

Cosponsor(s): ICAM-I2CAM Institute for Complex Adaptive Matter and Boston University; NSF Grant DMR-0844115

Support E-Mail: smr2253@ictp.it

Activity

25 Jul 2011 - 5 Aug 2011

@ Trieste - Italy

New Research Areas

Joint AAP/ICTP Activity on Special Training for install and use a Multi-Tier Data Infrastructure for storage and processing of climate related data for UNDP/AAP | (smr 2324)

Director(s): Joseph Intsiful (AAP/UNOPS, Dakar, Senegal)

Organizer(s): Dr. C. Onime (ICTP, Trieste, Italy) and Dr. S. Cozzini (CNR/IOM Democritos, Italy)

Local organizer(s): Dr. S. Cozzini (CNR/IOM Democritos, Italy)

Laboratories: AGH (Infolab.)

Secretary: C. Bosio

Cosponsor(s): UNDP/AAP Project

Support E-Mail: smr2324@ictp.it

Participation by invitation only

Activity

25 Jul 2011 - 29 Jul 2011

@ Trieste - Italy

Condensed Matter and Statistical Physics

Workshop on Sphere Packing and Amorphous Materials | (smr 2254)

Room: Adriatico Guest House Kastler Lecture Hall

Organizer(s): Directors: H. Cohn, S. Torquato, F. Zamponi; Local Organizer: A. Scardicchio

Laboratories: none

Secretary: D. Sauleek

Support E-Mail: smr2254@ictp.it

Seminar

26 Jul 2011

@ ICTP

Condensed Matter and Statistical Physics

Informal seminar on Statistical Physics: "Searching for needles in haystacks (Thinking about fast evolutionary processes through nextgen sequencing of tumors)"

Address: Strada Costiera, 11 I - 34151 Trieste (Italy)

Room: Leonardo da Vinci Building Seminar Room

Speaker(s): Raul RABADAN (Columbia University, New York)

Seminar Start Time: 12:30

Europe/Rome The momentum distribution of the protons participating in hydrogen bonds in water and ice deviates considerably from the classical equilibrium distribution. As a consequence the molecular structure of water and ice is directly affected by quantum mechanics. Yet the effect is essentially quasi-harmonic and quasi-classical in nature. New physics occurs in presence of proton tunneling, which is collective and dominated by strong local correlations. These effects will be discussed with special reference to the transition from ice VIII to ice VII, which is driven by quantum fluctuations under appropriate temperature an d pressure conditions. ICTP ICTP pio@ictp.it

Seminar

26 Jul 2011

@ ICTP

Condensed Matter and Statistical Physics

Address: Strada Costiera, 11 I - 34151 Trieste (Italy)

Room: Leonardo da Vinci Building Euler Lecture Hall

Speaker(s): Sadegh MOVAHED (IPM, Tehran, Iran)

Seminar Start Time: 17:30

Activity

1 Aug 2011 - 12 Aug 2011

@ Buenos Aires and Cordoba - Argentina

Mathematics

Latin American School and Conference of Algebraic Geometry and Applications (ELGA 2011) | (smr 2282)

Organizer(s): Directors: M. L. Barberis, F. Cukierman, A. Dickenstein, J. Fernandez, R. Miatello. ICTP Organiser: to be advised

Secretary: not required

Activity

1 Aug 2011 - 12 Aug 2011

@ Bandung - Indonesia

Mathematics

School on "Geometric Representation Theory" | (smr 2284)

Organizer(s): Organisers: Intan Muchtadi, Alexander Zimmermann; ICTP Organizer: to be advised

Secretary: not required

Cosponsor(s): CIMPA, UNESCO and MICINN

Europe/Rome The transport properties of three Luttinger liquid wires (with possibly different interaction strength), connected through a Y-junction, are studied within the scattering state formalism. The case of a symmetric set-up without magnetic flux is considered first, for which the scattering matrix and the matrix of conductances is parametrized by two variables. For these we derive coupled RG equations, with one-loop contributions summed to infinite order of bulk interaction. The Y-junction pierced by magnetic flux is similarly described by three coupled RG equations. The fixed point structure and and the implicit solution of these equations is presented. For sufficiently strong attractive interaction new fixed points are found. ICTP ICTP pio@ictp.it

Seminar

2 Aug 2011

@ ICTP

Condensed Matter and Statistical Physics

Informal seminar: "Y-junction of quantum wires: Fixed points structure and conductances"

Address: Strada Costiera, 11 I - 34151 Trieste (Italy)

Room: Leonardo da Vinci Building Luigi Stasi Seminar Room

Speaker(s): Dmitry N. ARISTOV (Petersburg Nuclear Physics Institute )

Seminar Start Time: 12:30

Europe/Rome Abstract: Observations show that galaxies have magnetic fields with a component that is coherent over a large fraction of the galaxy with field strength of order microGauss and coherence scale of order 10 kpc. Understanding the origin of these fields is one of the challenging questions of modern astrophysics. There are two scenarios under current discussion: an astrophysical one, where the needed seed field is generated on smaller scales, and a cosmological scenario where the seed field is generated prior to galaxy formation in the early universe on scales that are large at the present epoch. In this talk I will address the following questions: (i) How and when was this magnetic field generated? (ii) How does it evolve during the expansion of the universe? (iii) Can the amplitude and statistical properties of the magnetic field explain the strengths and correlation lengths of the magnetic fields observed in galaxies and clusters? (iv) Is the seed magnetic field detectable through cosmological observations, such as CMB anisotropy measurements or LSS observations? And (v) if yes, what are the observational constraints on such a primordial magnetic field? ICTP ICTP pio@ictp.it

Seminar

2 Aug 2011

@ ICTP

High Energy Cosmology and Astroparticle Physics , Cosmology

Cosmic Magnetic Fields: Origin, Evolution and Signature

Address: Strada Costiera, 11 I - 34151 Trieste (Italy)

Room: Leonardo da Vinci Building Luigi Stasi Seminar Room

Speaker(s): Tinatin KAHNIASHVILI (Carnegie Mellon University, USA and Ilia State University, Georgia)

Seminar Start Time: 17:30

Europe/Rome This is the continuation of the seminars of Physics of the Living State (Applied Physics Scientific Section). You will be especially welcome if you are visiting the Centre, or another Trieste Institute, as Associate Members, TRIL Fellows, or if you are from Affiliated Institutes in the various areas of Applied Physics. The summary of the seminar will be available at: http://www.ictp.it/~chelaf/ss282.html Refreshments will be served at the end of this event. ICTP ICTP pio@ictp.it

Seminar

3 Aug 2011

@ ICTP

Applied Physics

Systems Biology: Insights from Molecular Dynamics Simulations

Address: Strada Costiera, 11 I - 34151 Trieste (Italy)

Room: Leonardo da Vinci Building Oppenheimer Meeting Room

Speaker(s): Armen H. Poghosyan (Bioinformatics Group at the International Scientific - Educational Center of N.A.S., Armenia )

Support E-Mail: chelaf@ictp.it

Seminar Start Time: 16:30

Activity

8 Aug 2011 - 12 Aug 2011

@ Trieste - Italy

Earth System Physics

Workshop on Aerosol Impact in the Environment: from Air Pollution to Climate Change | (smr 2256)

Room: Leonardo da Vinci Building Euler Lecture Hall

Organizer(s): Directors: Dario Giaiotti, Fabien Solmon (Local Organiser), Fulvio Stel

Secretary: P. Wardell

Support E-Mail: smr2256@ictp.it

Activity

8 Aug 2011 - 26 Aug 2011

@ Trieste - Italy

Applied Physics

Joint ICTP-IAEA School of Nuclear Energy Management | (smr 2257)

Room: Adriatico Guest House Kastler Lecture Hall

Organizer(s): Y. Yanev (IAEA), C. Tuniz (ICTP)

Laboratories: AGH (Infolab.)

Secretary: A. Lusenti

Support E-Mail: smr2257@ictp.it

Europe/Rome This is the continuation of the seminars of Physics of the Living State (Applied Physics Scientific Section). You will have an opportunity of meeting other members, or visitors of the Applied Physics Scientific Section. You will be especially welcome if you are visiting the Centre from one of the Trieste Institutes, or from an Affiliated Institute, including our Associate Members, TRIL Fellows and STEP Fellows. The summary of the seminar is available at: http://www.ictp.it/~chelaf/ss284.html Refreshments will be served at the end of this event. ICTP ICTP pio@ictp.it

Seminar

10 Aug 2011

@ ICTP

Applied Physics

Modeling human osteoporosis: Going beyond prevention and diagnosis

Address: Strada Costiera, 11 I - 34151 Trieste (Italy)

Room: Leonardo da Vinci Building Oppenheimer Meeting Room

Speaker(s): Rita Cassia-Moura (Biological Sciences Institute, Pernambuco University Recife, Brazil)

Support E-Mail: chelaf@ictp.it

Seminar Start Time: 16:30

Activity

15 Aug 2011 - 26 Aug 2011

@ Trieste - Italy

High Energy Cosmology and Astroparticle Physics

Conference on Cold Materials, Hot Nuclei, and Black Holes: Applied Gauge/Gravity Duality | (smr 2258)

Room: Adriatico Guest House Giambiagi Lecture Hall

Organizer(s): Directors: Vijay Balasubramanian, Jan de Boer, Veronika Hubeny, M. Rangamani. Local Organiser: K. Narain

Laboratories: EKLUND Lab. AGH

Secretary: S. Fairclough

Support E-Mail: smr2258@ictp.it

Europe/Rome Cellular metabolism consists of a complex network of chemical reactions, which provide the cell with a reliable supply of energy and building blocks. Optimization approaches based on steady state approximations have been increasingly successful at predicting how individual microbial species allocate available resources under different environments and perturbations. Possible extensions of current approaches that incorporate interactions between different species can help understand natural microbial ecosystems and engineer artificial ones, with applications ranging from metabolic engineering to the human microbiome. ICTP ICTP pio@ictp.it

Seminar

16 Aug 2011

@ ICTP

Condensed Matter and Statistical Physics

Informal seminar on Statistical Physics: "From systems biology to synthetic ecology"

Address: Strada Costiera, 11 I - 34151 Trieste (Italy)

Room: Leonardo da Vinci Building Luigi Stasi Seminar Room

Speaker(s): Daniel SEGRE' (Boston University)

Seminar Start Time: 12:30

Hosted Activity

21 Aug 2011 - 27 Aug 2011

@ Trieste - Italy

Course and International Conference: "Turbulent Mixing and Beyond", TMB-2011 | (smr H269)

Room: Leonardo da Vinci Building Main Lecture Hall

Organizer(s): Prof. Snezhana I. Abarzhi, The University of Chicago, USA

Europe/Rome Abstract: The human brain weighs about 1.5 kilograms, and is made up of 100 billion neurons intricately connected via a network so dense that every cubic millimeter of the brain contains 4 kilometers of wire. The electrical activity of this incredibly complex network of neurons makes up human thought, and allows us to move, perceive, talk, plan, love, and do physics, all with a subtlety and precision that escapes the most powerful computers. And to do all this the brain uses only as much power as a refrigerator light bulb! I will discuss the strategies employed by neural circuits (e.g. specialization of function) to efficiently organize the use of power, space and other resources. Using the example of the circuits in the retina, I will argue that efficiency of computation can give a "theory of design" explaining key aspects of the observed architecture. Finally I will argue that there is a law of diminishing returns on these strategies. This law affects our ability to get "smarter" by evolving to have bigger brains (more neurons), using more energy (more active neurons), having more cleverly organized circuits, or even attaching plug-in external modules that could help the brain to do difficult things like multiplication. ICTP ICTP pio@ictp.it

Colloquium

24 Aug 2011

@ ICTP

How smart can you get? Computational efficiency in neural circuits

Address: Strada Costiera, 11 I - 34151 Trieste (Italy)

Room: Leonardo da Vinci Building Euler Lecture Hall

Speaker(s): Vijay Balasubramanian (University of Pennsylvania )

Colloquium Start Time: 15:30

Seminar

24 Aug 2011

@ ICTP

Mathematics

ALGEBRAIC GEOMETRY SEMINAR - Cremona groups

Address: Strada Costiera, 11 I - 34151 Trieste (Italy)

Room: Leonardo da Vinci Building Luigi Stasi Seminar Room

Speaker(s): Professor Yuri Prokhorov (Moscow State Lomonosov University, Russia)

Support E-Mail: math@ictp.it

Seminar Start Time: 15:30

Activity

1 Sep 2011 - 31 Oct 2011

@ Abuja - Nigeria

Mathematics

School on Differential Equations, Nonlinear Optimisation, Calculus of Variation and Evolution Equations | (smr 2285)

Organizer(s): Directors: C.E. Chidume, K. Ezzinbi, R.T. Ramakrishnan

Secretary: not required

* ACTIVITY CANCELLED *

Europe/Rome Abstract: This talk is divided into two parts. In the first half of the talk, I will discuss the generation of localized as well as non-local features (i.e. characteristic and repeated patterns that extend over a wide range of scales) in the inflationary scalar power spectrum that lead to a better fit to the CMB data than the conventional power law spectrum. In the second half, I will discuss the non-Gaussianities that arise in such scenarios, and how they compare with the current observational limits on the parameter f_NL. ICTP ICTP pio@ictp.it

Seminar

1 Sep 2011

@ ICTP

High Energy Cosmology and Astroparticle Physics , Cosmology

Local and non-local features in the primordial power spectrum and associated non-Gaussianties

Address: Strada Costiera, 11 I - 34151 Trieste (Italy)

Room: Leonardo da Vinci Building Euler Lecture Hall

Speaker(s): Dhiraj Kumar HAZRA (Harish-Chandra Research Institute, Allahabad, India)

Seminar Start Time: 17:30

Seminar

2 Sep 2011

@ ICTP

Mathematics

On some classes of shape optimization problems of higher codimensions

Address: Strada Costiera, 11 I - 34151 Trieste (Italy)

Room: Leonardo da Vinci Building Luigi Stasi Seminar Room

Speaker(s): Al-hassem NAYAM (ICTP/University of N'djamena, Chad)

Support E-Mail: math@ictp.it

Seminar Start Time: 15:30

Activity

5 Sep 2011 - 9 Sep 2011

@ Trieste - Italy

Applied Physics

2011 Joint ICTP-IAEA School of Nuclear Knowledge Management | (smr 2261)

Room: Adriatico Guest House Giambiagi Lecture Hall

Organizer(s): M.M. Sbaffoni IAEA, C. Tuniz ICTP

Laboratories: EKLUND Lab. AGH

Secretary: N. Ivanissevich

Collaborations: Knowledge Management Austria (Vienna, Austria)

Support E-Mail: smr2261@ictp.it

Activity

5 Sep 2011 - 16 Sep 2011

@ Trieste - Italy

Earth System Physics

Summer School on Climate Impacts Modelling for Developing Countries: Water, Agriculture and Health | (smr 2262)

Room: Adriatico Guest House Kastler Lecture Hall

Organizer(s): Directors: Erika Coppola, Adrian Tompkins, Soroosh Sorooshian, Andrew Challinor

Laboratories: AGH (Infolab.)

Secretary: S. Henningsen

Support E-Mail: smr2262@ictp.it

Activity

5 Sep 2011 - 16 Sep 2011

@ Santo André - Brazil

Condensed Matter and Statistical Physics

Sao Paulo ICTP/TWAS Advanced School on Computational Materials Science for Energy and Environmental Applications | (smr 2277)

Organizer(s): Directors: Edison Zacarias, Layla Martin-Samos, Caetano Rodrigues Miranda (Local Organiser), Sandro Scandolo (ICTP Organiser)

Secretary: R. del Rio

Support E-Mail: smr2277@ictp.it

Deadline (for those not requiring either financial support or visa) extended to 24 July 2011

Europe/Rome We evaluate volume of moduli space of BPS vortices on a compact genus h Riemann surface Sigma_h by using topological field theory and localization technique developed by Moore, Nekrasov and Shatashvili. We apply this technique to Abelian (ANO) vortex and show that the volume of moduli space agrees with the previous results obtained by integrating over the moduli space metric. We extend the evaluation to non-Abelian gauge groups and multi-flavors. We also compare our results with the volume of the Kahler quotient space inspired by the brane configuration. (arXiv:1105.2087[hep-th]). ICTP ICTP pio@ictp.it

Seminar

6 Sep 2011

@ ICTP

High Energy Cosmology and Astroparticle Physics , Strings and Higher Dimensional Theories

Volume of Moduli Space of Vortex Equations and Localization

Address: Strada Costiera, 11 I - 34151 Trieste (Italy)

Room: Leonardo da Vinci Building Luigi Stasi Seminar Room

Speaker(s): Norisuke SAKAI (Tokyo Woman's Christian University, Japan)

Seminar Start Time: 17:30

Seminar

8 Sep 2011

@ ICTP

High Energy Cosmology and Astroparticle Physics , Strings and Higher Dimensional Theories

Instantons and Supersymmetric Conformal Field Theory

Address: Strada Costiera, 11 I - 34151 Trieste (Italy)

Room: Leonardo da Vinci Building Euler Lecture Hall

Speaker(s): Alexander BELAVIN (Russian Academy of Sciences, Moscow)

Seminar Start Time: 15:30

Activity

12 Sep 2011 - 16 Sep 2011

@ Trieste - Italy

Condensed Matter and Statistical Physics

Joint ICTP-FANAS Conference on Trends in Nanotribology | (smr 2259)

Room: Leonardo da Vinci Building Main Lecture Hall

Organizer(s): Directors: Oguz Gulseren, Nicola Manini, Andrea Vanossi; Erio Tosatti (Local Organiser)

Laboratories: none

Secretary: S. Radosic

Support E-Mail: smr2259@ictp.it

Hosted Activity

@ ICTP

Applied Physics

Overview of Current and Future Research and Development activities of the Nuclear Spectrometry and Applications Laboratory (NSAL), Physics Section, IAEA

Address: Strada Costiera, 11 I - 34151 Trieste (Italy)

Room: Leonardo da Vinci Building Luigi Stasi Seminar Room

Speaker(s): Andreas-Germanos Karydas (IAEA, Physics Section, Division of Physical and Chemical Sciences Department of Nuclear Sciences and Applications, Vienna, Austria)

Support E-Mail: chelaf@ictp.it

Seminar Start Time: 12:00

Europe/Rome I will first review the problem of the directed polymer (DP) in a random potential and of the Kardar Parisi Zhang (KPZ) growth equation, and their mutual relation. I will introduce the replica Bethe Ansatz method and how it has allowed us to obtain the distribution of the free energy of the DP and of the height field of the KPZ equation. For large polymer size (large KPZ time) this distribution converges to the Tracy Widom distribution of the largest eigenvalue of a gaussian random matrix. I will discuss our results for both fixed and free endpoints corresponding to growth from a droplet or from an initially flat interface. ICTP ICTP pio@ictp.it

Seminar

15 Sep 2011

@ ICTP

Condensed Matter and Statistical Physics

Seminar on Disorder and strong electron correlations: "Universal statistics for directed polymers and the KPZ equation from the replica Bethe Ansatz"

Address: Strada Costiera, 11 I - 34151 Trieste (Italy)

Room: Leonardo da Vinci Building Luigi Stasi Seminar Room

Speaker(s): Pierre LE DOUSSAL (Ecole Normale Superieure, Paris )

Seminar Start Time: 12:30

Europe/Rome This year, the CERN Large Hadron Collider has performed exceptionally, delivering the world's highest energy proton-proton collisions at a record breaking luminosity. By the time of this conference, up to one inverse femtobarn of p-p collision data at 7 TeV is expected to be delivered to the ATLAS and CMS experiments. This conference will provide an overview of all the results on Beyond the Standard Model physics obtained by the LHC experiments. Experimentalists and theorists will discuss these results and develop their interpretation in a broader phenomenological context. In addition to the plenary talks, there will be dedicated sessions for younger physicists, both members of LHC data analysis teams and theorists, to present results. Trieste - Italy ICTP pio@ictp.it

Activity

19 Sep 2011 - 23 Sep 2011

@ Trieste - Italy

High Energy Cosmology and Astroparticle Physics , LHC Physics

Beyond the Standard Model: Results with the 7 TeV LHC Collision Data | (smr 2263)

Room: Leonardo da Vinci Building Main Lecture Hall

Organizer(s): B. Acharya (ICTP), F. Quevedo (ICTP), M. Spiropulu (CERN/Caltech)

Secretary: N. van Buuren

Collaborations: The Italian Institute for Nuclear Physics (INFN)

Support E-Mail: smr2263@ictp.it

Hosted Activity

Support E-Mail: math@ictp.it

Seminar Start Time: 15:30

Activity

3 Oct 2011 - 7 Oct 2011

@ Trieste - Italy

Applied Physics

Joint ICTP-IAEA Advanced Course on Mammography | (smr 2266)

Room: Leonardo da Vinci Building Euler Lecture Hall

Organizer(s): L. Bertocchi (ICTP), M. de Denaro (Trieste), P. Kivitz (ACR), D. McLean (IAEA), R. Padovani (EFOMP), M. Yaffe (AAPM),

Laboratories: MB Infolab (MB_LAB)

Secretary: S. Radosic

Support E-Mail: smr2266@ictp.it

Activity

3 Oct 2011 - 14 Oct 2011

@ Trieste - Italy

Applied Physics

Joint ITER-IAEA-ICTP Advanced Workshop on Fusion and Plasma Physics | (smr 2267)

Room: Adriatico Guest House Giambiagi Lecture Hall

Organizer(s): IAEA: G. Mank (FZJ, Jülich, Germany), R. Kamendje (IAEA, Vienna, Austria). D. Campbell (ITER, St. Paul -lez -Durance, France). P.K. Shukla (Ruhr-Univ., Bochum, Germany). ICTP: J. Niemela (ICTP)

Laboratories: MLAB and Eklund Lab AGH

Secretary: L. Iannitti

Collaborations: Participation and sponsorship of the Institute for Plasma Physics and Laser Microfusion, Poland, is gratefully acknowledged

Support E-Mail: smr2267@ictp.it

Hosted Activity

3 Oct 2011 - 14 Oct 2011

@ Trieste - Italy

IAEA Workshop on "Essential Safety Assessment Knowledge: Safety Analysis Series: Introduction to Level 1 and Level 2 PSA" | (smr H273)

Room: Adriatico Guest House Denardo Lecture Hall

Organizer(s): IAEA (M. Mellinger)

Secretary: Ms. M. Mellinger

Seminar

3 Oct 2011

@ ICTP

DYNAMICAL SYSTEMS SEMINARS - A simple approach to rigorous approximation of invariant measures

Address: Strada Costiera, 11 I - 34151 Trieste (Italy)

Room: Leonardo da Vinci Building Luigi Stasi Seminar Room

Speaker(s): Isaia Nisoli (UFRJ, Rio de Janeiro, Brazil)

Support E-Mail: math@ictp.it

Seminar Start Time: 16:30

Europe/Rome Expansive systems are dynamical systems which share many of the topological features of hyperbolic systems but can be defined and studied in the much more general setting of metric spaces rather than Riemannian manifolds. In this talk I will give the basic definitions and results of the theory. Additional talks may be given over the next couple of weeks forming an introductory mini-course on the subject. ICTP ICTP pio@ictp.it

Seminar

7 Oct 2011

@ ICTP

Mathematics

DYNAMICAL SYSTEMS SEMINARS - An introduction to Expansive systems (POSTPONED - date to be announced)

Address: Strada Costiera, 11 I - 34151 Trieste (Italy)

Room: Leonardo da Vinci Building Luigi Stasi Seminar Room

Speaker(s): Professor Jorge Lewowicz (Universidad de la Republica, Montevideo, Uruguay)

Support E-Mail: math@ictp.it

Seminar Start Time: 17:30

Hosted Activity

8 Oct 2011

@ Trieste - Italy

Meeting on "Out-of-hospital cardiac arrest (OHCA): towards a post resuscitation care multidisciplinary protocol" | (smr H291)

Room: Leonardo da Vinci Building Main Lecture Hall

Organizer(s): Department of Cardiology, Cattinara Hospital, Trieste

Secretary: Key Congressi

Activity

10 Oct 2011 - 14 Oct 2011

@ Trieste - Italy

DYNAMICAL SYSTEMS SEMINARS - Decay of correlations for fiber contracting maps.

Address: Strada Costiera, 11 I - 34151 Trieste (Italy)

Room: Leonardo da Vinci Building Luigi Stasi Seminar Room

Speaker(s): Professor Maria Jose' Pacifico (Universidade Federal do Rio de Janeiro, Brazil)

Seminar Start Time: 16:00

Seminar

13 Oct 2011

@ ICTP

High Energy Cosmology and Astroparticle Physics , Cosmology

Large scale fluctuations in the SDSS and their ISW signal

Address: Strada Costiera, 11 I - 34151 Trieste (Italy)

Room: Leonardo da Vinci Building Euler Lecture Hall

Speaker(s): Peter PAPAI (ICTP)

Seminar Start Time: 17:30

Activity

17 Oct 2011 - 21 Oct 2011

@ Trieste - Italy

New Research Areas , Condensed Matter and Statistical Physics

ICTP-SISSA Workshop on New Materials for Renewable Energy | (smr 2269)

Room: Leonardo da Vinci Building Main Lecture Hall

Organizer(s): Directors: Stefano Fabris and Ralph Gebauer

Laboratories: none requested

Secretary: M. de Comelli

Cosponsor(s): CECAM and CNR-IOM DEMOCRITOS, Trieste, Italy.

Support E-Mail: smr2269@ictp.it

Activity

17 Oct 2011 - 21 Oct 2011

@ Trieste - Italy

New Research Areas

Joint ICTP-TWAS Workshop on Science Communication in Developing Countries: Bridging the Gap between Science, Policy and the General Public | (smr 2293)

Room: Adriatico Guest House Kastler Lecture Hall

Organizer(s): Claudio Tuniz and Mary Ann Williams (ICTP), Daniel Schaffer (TWAS), Dipali Chauhan (IOP), Domenico Pitrelli (SISSA)

Laboratories: EKLUND Lab. AGH

Secretary: R. del Rio

Support E-Mail: smr2293@ictp.it

Hosted Activity

17 Oct 2011 - 28 Oct 2011

@ Trieste - Italy

IAEA Workshop on: Monte Carlo radiation transport and associated data needs for medical applications | (smr H270)

Room: Adriatico Guest House Giambiagi Lecture Hall

Organizer(s): Mr. Roberto Capote Noy (IAEA)

Laboratories: INFOLAB AGH

Secretary: Ms. Kira Nathani (IAEA)

Europe/Rome An overview is given of the logarithmic minimal models as prototypical examples of logarithmic CFTs. In the boundary theory, multiplication in the Grothendieck ring of W-projective representations leads to a Verlinde-like formula involving A-type twisted affine graphs and their coset graphs. This provides compact formulas for the conformal partition functions with W-projective boundary conditions. On the torus, modular invariant partition functions are proposed as sesquilinear forms in W-projective and rational minimal characters that are encoded by the same coset fusion graphs. SISSA, Santorio Bldg., Room 108 (1st floor) ICTP pio@ictp.it

Seminar

18 Oct 2011

@ SISSA, Santorio Bldg., Room 108 (1st floor)

Condensed Matter and Statistical Physics

Joint ICTP/SISSA Statistical Physics seminar: "Coset graphs in logarithmic minimal models"

Speaker(s): P. PEARCE (University of Melbourne)

Seminar Start Time: 12:00

Seminar

18 Oct 2011

@ ICTP

High Energy Cosmology and Astroparticle Physics , Strings and Higher Dimensional Theories

The effective action of Double Field Theory (arXiv:1109.0290)

Address: Strada Costiera, 11 I - 34151 Trieste (Italy)

Room: Leonardo da Vinci Building Luigi Stasi Seminar Room

Speaker(s): Diego MARQUES (Univ. Nacional de la Plata, Argentina)

Seminar Start Time: 17:30

Seminar

19 Oct 2011

@ ICTP

High Energy Cosmology and Astroparticle Physics , Strings and Higher Dimensional Theories

On renormalization Group Flows in Four Dimensions

Address: Strada Costiera, 11 I - 34151 Trieste (Italy)

Room: Leonardo da Vinci Building Euler Lecture Hall

Speaker(s): Zohar KOMARGODSKI (Weizman Institute of Sciences, Rehovot, Israel)

Seminar Start Time: 16:00

Europe/Rome We apply a general technique, based on the similarity renormalization procedure introduced by Glazek and Wilson, to investigate the strong coupling expansion of the Bose-Hubbard model at half filling. This approach provides a mapping of the Bose-Hubbard model onto an XXZ spin-1/2 magnetic chain, with renormalized exchange energy J and renormalized anisotropy parameter Delta. We then exploit the analytical results available for the spin-1/2 XXZ model in a finite chain of length N to compute the correlation functions of the Bose-Hubbard model and to compare them with those obtained from the numerical density matrix renormalization group approach; the agreement is very good, even at N = 30. Our approach allows to engineer a reliable quantum magnetic analog of the Bose-Hubbard model, enabling us to show that the superfluid-charge density wave (superfluid-Mott insulator) phase transition of the Bose-Hubbard model corresponds, for Delta =1 (Delta =-1) to the spin liquid-antiferromagnet (spin liquid-ferromagnet) phase transition of the XXZ-model. [with the collaboration of P. Sodano (Università di Perugia), D. Rossini (SNS-Pisa), A. Trombettoni (SISSA)] ICTP ICTP pio@ictp.it

Seminar

19 Oct 2011

@ ICTP

Condensed Matter and Statistical Physics

Special seminar: " XXZ Spin-1/2 chain representation of the one-dimensional Bose-Hubbard model at half-filling "

Address: Strada Costiera, 11 I - 34151 Trieste (Italy)

Room: Leonardo da Vinci Building Luigi Stasi Seminar Room

Speaker(s): Domenico GIULIANO (Università della Calabria )

Seminar Start Time: 17:00

Seminar

19 Oct 2011

@ ICTP

High Energy Cosmology and Astroparticle Physics , Strings and Higher Dimensional Theories

Sequestering in brane world supersymmetry breaking and its realization in string models

Address: Strada Costiera, 11 I - 34151 Trieste (Italy)

Room: Leonardo da Vinci Building Euler Lecture Hall

Speaker(s): Claudio SCRUCCA (ITPP, Lausanne, Switzerland)

Seminar Start Time: 17:30

Europe/Rome Anderson localization is a metal-insulator transition caused by disorder. It has been connected to several phenomena such as conductivity of solids, transport of light and sound in random media, and the quantum Hall transition. The scaling theory of localization predicts that all states are localized in 1D and 2D disordered systems. In 3D there exists a transition point where the eigenstates are critical and have multifractal structure. I report how this multifractality has recently been observed in the Anderson transition of ultrasound in a 3D metal network. Furthermore, using analytic calculations and numerical simulations, I show that the propagation of electromagnetic polar waves in a 1D array of near-resonant scatterers also follows critical scaling behavior. This is caused by the long-range interaction between the scatterers, which is not treated by the scaling theory. ICTP ICTP pio@ictp.it

Seminar

20 Oct 2011

@ ICTP

Condensed Matter and Statistical Physics

Seminar on Disorder and strong electron correlations: "Identifying the critical state of the Anderson localization transition with its multifractality"

Address: Strada Costiera, 11 I - 34151 Trieste (Italy)

Room: Leonardo da Vinci Building Luigi Stasi Seminar Room

Speaker(s): Sanli FAEZ (Max-Planck Institute for the Science of Light, Erlangen )

Seminar Start Time: 12:30

Europe/Rome The eternal inflation scenario predicts that our observable universe resides inside a single bubble embedded in a vast inflating multiverse. Collisions between bubble universes imprinted in the CMB sky provide a powerful observational test of this idea. I will describe a robust algorithm for non-Gaussian source detection in massive datasets, and present its application to the search for bubble collision signatures in CMB data from WMAP. ICTP ICTP pio@ictp.it

Seminar

20 Oct 2011

@ ICTP

High Energy Cosmology and Astroparticle Physics , Cosmology

First observational tests of eternal inflation

Address: Strada Costiera, 11 I - 34151 Trieste (Italy)

Room: Leonardo da Vinci Building Euler Lecture Hall

Speaker(s): Hiranya PEIRIS (University College London)

Seminar Start Time: 17:30

Europe/Rome * ACTIVITY CANCELLED * "NEW DATES" 24 OCTOBER - 4 NOVEMBER 2011 To avoid overlapping with the 'IRI WORKSHOP 2011' to be held in Hermanus, South Africa, 10-14 October 2011, this workshop has been postponed to 24 October - 4 November 2011. The Organizers apologize for any inconvenience this may cause. Abuja - Nigeria ICTP pio@ictp.it

Activity

24 Oct 2011 - 4 Nov 2011

@ Abuja - Nigeria

Applied Physics

Joint ICTP-TWAS-BC Third Workshop on Satellite Navigation Science and Technology for Africa | (smr 2276)

Organizer(s): Directors: Sandro M. Radicella, Patricia Doherty. Local Organiser: Charles Chidume

Secretary: P. Wardell

Support E-Mail: smr2276@ictp.it

* ACTIVITY CANCELLED *

Hosted Activity

@ ICTP

Applied Physics

High Energy Cosmology and Astroparticle Physics , Cosmology

Velocity Probes in Cosmology

Address: Strada Costiera, 11 I - 34151 Trieste (Italy)

Room: Leonardo da Vinci Building Euler Lecture Hall

Speaker(s): Tsz Yan LAM (The University of Tokyo, Japan)

Seminar Start Time: 17:30

Activity

30 Oct 2011 - 5 Nov 2011

@ Heredia - Costa Rica

Advanced School on Applications of Molecular Simulations in Oil and Gas Industry | (smr 2184)

Organizer(s): Directors: S. Scandolo, G.A. Adebayo, C.R. Miranda. plus 1. Local Organizers in Nigeria: M.R. Darma, J.O. Idiodi, B.C. Anusionwu plus 2

Secretary: K. Mabilo

Support E-Mail: smr2184@ictp.it

* ACTIVITY CANCELLED *

Europe/Rome Here we will introduce Mahler measure of Polynomials (and/or algebraic numbers) and Lehmer's Problem (known as Lehmer Conjecture). Then we will see some recent results toward lehmer problem and equivelent forms of lehmer problem, specially lehmer problem in terms of (logarithmic Weil height) heights of algebraic numbers. Also we will show an improved result of F. Amoroso (University of Torino, Italy) and R. Dvornicich (University of Pisa, Italy), of abelian height. Finally some interesting directions towards future work. ICTP ICTP pio@ictp.it

Seminar

3 Nov 2011

@ ICTP

Mathematics

Lehmer conjecture and an improved lower bound for abelian height.

Address: Strada Costiera, 11 I - 34151 Trieste (Italy)

Room: Leonardo da Vinci Building Luigi Stasi Seminar Room

Speaker(s): Dr. M.I.M. Ishak (University of Peradeniya, Sri Lanka)

Support E-Mail: math@ictp.it

Seminar Start Time: 15:00

Europe/Rome Abstract: In this lecture by using focal loci techniques we give a reconstruction for general curves of genus 6 and 8. To do this we prove that the focal variety is a hyper surface in the genus 6 case. Moreover we will speak about the connection of these constructions with the Shuttky problem. ICTP ICTP pio@ictp.it

Seminar

4 Nov 2011

@ ICTP

Mathematics

Family of linear spaces and reconstruction of curves

Address: Strada Costiera, 11 I - 34151 Trieste (Italy)

Room: Leonardo da Vinci Building Luigi Stasi Seminar Room

Speaker(s): Dr. Ali Bajravani (Tarbiat Moallem University, Tehran, Iran)

Seminar Start Time: 14:30

Hosted Activity

5 Nov 2011 - 7 Nov 2011

@ Trieste - Italy

16th International Congress of Cryosurgery | (smr H278)

Room: Leonardo da Vinci Building Main Lecture Hall

Organizer(s): International Society of Cryosurgery (Trieste, Italy); Local Organizer: Dr. F. Lugnani.

Secretary: Dr. M. Miotti

Hosted Activity

6 Nov 2011 - 13 Nov 2011

@ Trieste - Italy

V edizione della Scuola Archivistica d'Autunno | (smr H275)

Room: Adriatico Guest House - Eklund Informatics Lab (Lower Level 1)

Organizer(s): Archivio di Stato di Trieste and Int'l Institute for Archival Science of Trieste and Maribor (Dr. G. Tato')

Laboratories: AGH (Infolab.)

Secretary: Mr. A. Monteduro

Europe/Rome The Abdus Salam International Centre for Theoretical Physics (ICTP) is organizing a Regional Workshop on Optofluidics and Optical to be held from 7 November to 11 November, 2011 at the University of Cape Coast, Ghana. Optical manipulation implies the use of the radiation pressure of light on small samples immersed in liquid, gas or vacuum. Accordingly the technique is called optical tweezers (liquid) or optical levitation (gas or vacuum). Advances in these areas have lead to very interesting application-driven research and technology development. The goals of the workshop are to introduce the principles of optical manipulation, discuss in detail some of the multidisciplinary application areas of interest to West Africa, and to have participants run basic experiments under expert supervision. The long-term goals are to foster a sustainable effort in the areas of biophysics and biomedicine in West Africa. Specifically, a major application in biophysics is the study of the mechanical properties of cells and of many types of motor molecules and other macromolecules responsible for the motion of organelles within cells and the locomotion of entire cells. Such studies can be initiated with the optical techniques covered by this workshop. MAIN TOPICS OF THE SCHOOL: •Fundamentals of optical manipulation: optical tweezers and optical levitation. •Fundamentals of micro-fluidics and phase optical microscopy •Fundamentals of cell mechanics and molecular motors •Research topics in optical manipulation and applications in life science. •Experimental demonstrations of optical manipulation. •Discussions on instrumentation development, and possible low cost – high impact applications in physics and biomedicine. PARTICIPATION Scientists from all countries that are members of the United Nations, UNESCO or IAEA may attend the Workshop. As it will be conducted in English, participants should have an adequate working knowledge of that language. Although the main purpose of the Centre is to help researchers from developing nations through a programme of training activities within the framework of international cooperation, students and scientists from developed countries are also welcome to attend. Travel and subsistence expenses of the participants should be borne by their home institution. There is no registration fee. HOW TO APPLY FOR PARTICIPATION The application form can be accessed at the activity website: http://agenda.ictp.it/smr.php?2287 Once in the website, comprehensive instructions will guide you step-by-step, on how to fill out and submit the application form. Activity Secretariat: The Abdus Salam International Centre for Theoretical Physics (ICTP) (SMR 2287) Strada Costiera 11 I-34151 Trieste, Italy Telephone: +39-040-2240-455; Telefax: +39-040-2240-7455 E-mail: smr2287@ictp.it ICTP Home Page: http://www.ictp.it Cape Coast - Ghana ICTP pio@ictp.it

Activity

7 Nov 2011 - 11 Nov 2011

@ Cape Coast - Ghana

Applied Physics

Regional Workshop on Optofluidics and Optical Manipulation | (smr 2287)

Organizer(s): Directors: Paul Buah-Bussah (Local), Francis Allotey (Regional), Dan Cojoc and Joe Niemela (Outside)

Secretary: K. Mabilo

Support E-Mail: smr2287@ictp.it

Europe/Rome I will discuss the role of the absolute value (that is, not modulo 2\pi) of the topological angle in conformal sigma models. This will be applied to the spin quantum Hall (class C) problem, where I will show that the different plateaus exhibit different transport properties due to the presence of extra edge states. ICTP ICTP pio@ictp.it

Seminar

8 Nov 2011

@ ICTP

Condensed Matter and Statistical Physics

Joint ICTP/SISSA Statistical Physics seminar: "Edge properties and the absolute value of the topological angle"

Address: Strada Costiera, 11 I - 34151 Trieste (Italy)

Room: Leonardo da Vinci Building Luigi Stasi Seminar Room

Speaker(s): Hubert SALEUR (IPhT Saclay, Paris )

Seminar Start Time: 11:30

Hosted Activity

9 Nov 2011 - 11 Nov 2011

@ Trieste - Italy

COST ACTION MP0901, Annual Scientific Meeting: Designing novel materials for nanodevices: From Theory to Practice (NanoTP) | (smr H271)

Room: Adriatico Guest House Giambiagi Lecture Hall

Organizer(s): Dr. Carla Bittencourt (University of Mons, Belgium); Local Organizer: L. Petaccia (Sincrotrone Trieste)

Secretary: no ICTP

Seminar

9 Nov 2011

@ ICTP

Mathematics

Poincare' Sobolev equations in the Hyperbolic space

Address: Strada Costiera, 11 I - 34151 Trieste (Italy)

Room: Leonardo da Vinci Building Luigi Stasi Seminar Room

Speaker(s): Dr. Mousomi Bhakta (TIFR, Bangalore, India)

Seminar Start Time: 14:30

Hosted Activity

10 Nov 2011 - 11 Nov 2011

@ Trieste - Italy

Commemorative Meeting for Sasha Gogolin on Many-Body Theory | (smr H289)

Seminar Start Time: 09:30

Activity

14 Nov 2011 - 18 Nov 2011

@ Trieste - Italy

Applied Physics

Joint ICTP-IAEA Workshop on Non-adiabatic Dynamics and Radiation Damage in Nuclear Materials | (smr 2260)

Room: Leonardo da Vinci Building Euler Lecture Hall

Organizer(s): IAEA: V. Inozemtsev. Queen's University, Belfast: J. Kohanoff. ICTP: S. Scandolo

Laboratories: LB LAB

Secretary: R. del Rio

Support E-Mail: smr2260@ictp.it

Europe/Rome The aim of this activity is to train participants in the planning, designing, building and maintaining broadband wireless data networks that can cover considerable distances. Such networks can be used to provide Internet access, build Campus networks, or collect data from remote sensors with scientific, environmental, and many other applications. The use of alternative energy source to power the communication devices will be emphasized, as these solutions are particularly useful in rural areas where grid power may be lacking or unreliable. The development of the Wireless Training Kit that will be used for this training was sponsored by Unesco and is freely available to be adopted as a teaching instrument for the interested participants. (El propósito de esta actividad es el de entrenar a los participantes en la plainificación, diseño, construcción y mantenimiento de redes inalámbricas de banda ancha que pueden cubrir distancias considerable. Estas redes pueden usarse para acceso a Internet, para constituir redes de Campus, o para recolectar datos de sensors remotos, con aplicaciones científicas, ambientales y de muchos otros tipos. Se enfatizará el uso de fuentes alternativas de energía para alimentar a los equipos de telecomunicaciones, puesto que estas soluciones son particularmente relevantes en zonas rurarles en las que el suministro electric puede no existir o ser deficiente. El kit de entrenamiento en redes inalámbricas (WTKit) que se utilizará en esta actividad fue desarrollado en el ICTP a solicitud de la UNESCO y puede ser utilizado gratuitamente como instrumento de enseñanza por aquellos participantes que deseen convertirse en instructors en sus respectivas sedes.) El idioma del taller, incluyendo el material de apoyo, es el español. La inscripción en el taller es gratuita para participantes calificados. Guatemala City - Guatemala ICTP pio@ictp.it

Activity

14 Nov 2011 - 25 Nov 2011

@ Guatemala City - Guatemala

New Research Areas

Joint ICTP-TWAS Workshop on Low Cost Solutions for Wireless Connectivity | (smr 2289)

Organizer(s): Directors: Sandro M. Radicella, Ermanno Pietrosemoli, Edgar Anibal Cifuentes Anleu (Local Organizer)

Secretary: S. Tanaskovic

Support E-Mail: smr2289@ictp.it

Activity

14 Nov 2011 - 25 Nov 2011

@ Trieste - Italy

High Energy Cosmology and Astroparticle Physics

School and Conference on Analytical and Computational Astrophysics | (smr 2292)

Room: Adriatico Guest House Giambiagi Lecture Hall

Organizer(s): Directors: Daniel Gomez, Swadesh Mahajan, Silvano Massaglia, Stefaan Poedts, Andria Rogava; Local Organisers: Annalisa Celotti, Ravi Sheth.

Laboratories: AGH (Infolab.)

Secretary: A. Lusenti

Cosponsor(s): co-sponsored by EPS, European Physical Society

Support E-Mail: smr2292@ictp.it

Hosted Activity

14 Nov 2011 - 16 Nov 2011

@ Trieste - Italy

New Frontiers in Atomic, Molecular and Cluster Physics and Chemistry, followed by: Nanoenergetics: Theoretical and Experimental Approaches | (smr H284)

Room: Adriatico Guest House Kastler Lecture Hall

Organizer(s): Users' Office, ELETTRA, Sincrotrone Trieste

Secretary: Ms. Bassanese and Ms. Pierandrei

Europe/Rome Parameter estimation is a central issue in system modeling, the tipical setting is to start with a given set of measurements and extract the parameters of a model supposed to describe the system under scrutiny. The recent availability of large datasets coming from the complex system has made even more pressing the quest for efficient models, and the related parameter extraction techniques. We study Ising chains with arbitrary multispin finite-range couplings, providing an explicit solution of the associated inverse Ising problem, i.e. the problem of inferring the values of the coupling constants from the correlation functions. As an application, we reconstruct the couplings of chain Ising Hamiltonians having exponential or power-law two-spin plus three- or four-spin couplings. The generalization of the method to ladders and to Ising systems where a mean-field interaction is added to general finite-range couplings is also discussed. SISSA, Santorio Building, Room 128 (1st Floor) ICTP pio@ictp.it

Seminar

15 Nov 2011

@ SISSA, Santorio Building, Room 128 (1st Floor)

Condensed Matter and Statistical Physics

Joint ICTP/SISSA Statistical Physics seminar: "The inverse Ising problem for one-dimensional chains with arbitrary finite-range couplings"

Speaker(s): G. GORI (SISSA)

Seminar Start Time: 11:00

Europe/Rome Motivated by recent experiments observing self-organization of Bose--Einstein condensates in optical cavities we investigate the collective dynamics of the associated non-equilibrium Dicke model. We find a rich phase diagram including distinct superradiant fixed points, coexistence phases, and regimes of persistent oscillations. We explore the intrinsic timescales for observing these novel phases and discuss the implications for finite duration experiments. ICTP ICTP pio@ictp.it

Seminar

17 Nov 2011

@ ICTP

Condensed Matter and Statistical Physics

Seminar on Disorder and strong electron correlations: "Collective dynamics of a Bose-Einstein condensate coupled to light"

Address: Strada Costiera, 11 I - 34151 Trieste (Italy)

Room: Leonardo da Vinci Building Luigi Stasi Seminar Room

Speaker(s): Joe Miraculous BHASEEN (Cambridge University)

Seminar Start Time: 11:30

Seminar

17 Nov 2011

@ ICTP

High Energy Cosmology and Astroparticle Physics , Cosmology

Photometric redshifts and cosmology

Address: Strada Costiera, 11 I - 34151 Trieste (Italy)

Room: Leonardo da Vinci Building Luigi Stasi Seminar Room

Speaker(s): Carlos CUNHA (University of Michigan, USA)

Seminar Start Time: 16:30

Hosted Activity

19 Nov 2011 - 23 Nov 2011

@ Trieste - Italy

TWAS 22nd General Meeting | (smr H283)

Room: Leonardo da Vinci Building Main Lecture Hall

Organizer(s): The Academy of Sciences for the Developing World (TWAS)

Secretary: Ms. Helen Kruzic

Participation by invitation.

Activity

21 Nov 2011 - 25 Nov 2011

@ Trieste - Italy

Joint ICTP-IAEA School on Synchrotron Applications in Cultural Heritage and Environmental Sciences and Multidisciplinary Aspects of Imaging Techniques | (smr 2272)

Room: Adriatico Guest House Kastler Lecture Hall

Organizer(s): IAEA: F. Muelhauser, ICTP: C. Tuniz, Elettra: G. Paolucci, UNESCO: A. Paolini.

Secretary: E. Brancaccio

Support E-Mail: smr2272@ictp.it

Europe/Rome The seminar will provide a pedagogical introduction to the Casimir effect. An overview will be given of open theoretical puzzles and of recent experiments, with an eye on perpsective applications of the Casimir effect to nanotechnology. ICTP ICTP pio@ictp.it

Seminar

22 Nov 2011

@ ICTP

Flavor without R-parity and neutrino masses

Address: Strada Costiera, 11 I - 34151 Trieste (Italy)

Room: Leonardo da Vinci Building Euler Lecture Hall

Speaker(s): Marco NARDECCHIA (CP3-Origins, University of Southern Denmark)

Seminar Start Time: 16:30

Activity

28 Nov 2011 - 5 Dec 2011

@ Trieste - Italy

New Research Areas

International School on Geothermal Exploration | (smr 2271)

Room: Adriatico Guest House Kastler Lecture Hall

Organizer(s): Directors: D. Chandrasekharam (IIT - Bombay, India), Michele Pipan (Univ. Trieste, Italy), Adele Manzella (CNR, Italy), Ruggero Bertani (ENEL Green Power, Italy) Local Organisers: G. Furlan and A. Aoudia

Laboratories: EKLUND Lab. AGH

Secretary: L. Iannitti

Support E-Mail: smr2271@ictp.it

Activity

28 Nov 2011 - 16 Dec 2011

@ Trieste - Italy

New Research Areas

Second Workshop on Open Source and the Internet for Building Global Scientific Communities | (smr 2273)

Room: Adriatico Guest House Kastler Lecture Hall

Organizer(s): Directors: Abhaya Induruwa, Carlos Kavka, Uli Raich. Local Organizers: A. Cicuttin and M.L. Crespo

Laboratories: AGH (Infolab.)

Secretary: P. Wardell

Cosponsor(s): Co -Sponsor: ESTECO Srl - Italy

Support E-Mail: smr2273@ictp.it

Seminar

28 Nov 2011

@ ICTP

High Energy Cosmology and Astroparticle Physics , Strings and Higher Dimensional Theories

VIDEO STRING THEORY JOURNAL CLUB at ICTP: Emergent Spacetime from AdS/CFT

Address: Strada Costiera, 11 I - 34151 Trieste (Italy)

Room: Leonardo da Vinci Building Euler Lecture Hall

Speaker(s): J. POLCHINSKI

Seminar Start Time: 14:30

Europe/Rome Small systems in thermal environments such as particles in optical traps or molecular motors can be driven from one state to another while dissipating work. The statistics of work is related to the free energy difference between the states by Jarzynski's relation, but most characteristics of the process e.g. the sample variance of Jarzynski's relation, or expected released heat or expected work itself depend on protocol details. We show that in a Langevin equation setting the optimal protocol is essentially given by the backwards-forwards solution of optimal control, investigated long ago by F. Guerra and L. Morato in the context of stochastic quantization. For the specific case of optimising heat or work the situation simplifies dramatically, and the coupled backwards-forwards solution reduces to only Burgers equation for an auxiliary field, and mass transport by the Burgers velocity field [1]. I will discuss these results and possible extensions and applications. For instance, if temperature is not constant and time and space an analogous simplification occurs but not for the heat but instead for the entropy production in the environment. This is joint work with Paolo-Muratore-Ginanneschi, Carlos Mejia-Monasteiro, Stefano Bo, Antonio Celani and Ralf Eichhorn. [1] Erik Aurell, Carlos Mejia-Monasterio, Paolo Muratore-Ginanneschi; Optimal protocols and optimal transport in stochastic thermodynamics; Phys. Rev. Lett. 106, 250601 (2011) SISSA, Santorio Bldg., room 128 1st floor ICTP pio@ictp.it

Seminar

29 Nov 2011

@ SISSA, Santorio Bldg., room 128 1st floor

Condensed Matter and Statistical Physics

Joint ICTP/SISSA Statistical Physics seminar: "Optimal protocols and optimal transport in the physics of small systems"

Speaker(s): Erik AURELL (University of Stockholm )

Seminar Start Time: 11:00

Seminar

29 Nov 2011

@ ICTP

High Energy Cosmology and Astroparticle Physics , Strings and Higher Dimensional Theories

Brane-Antibrane Backreaction in Axion Monodromy Inflation

Address: Strada Costiera, 11 I - 34151 Trieste (Italy)

Room: Leonardo da Vinci Building Luigi Stasi Seminar Room

Speaker(s): Joseph CONLON (Rudolf Peierls Center for Theoretical Physics, Oxford, UK)

Seminar Start Time: 16:30

Seminar

30 Nov 2011

@ ICTP

Applied Physics

Haemoglobin Sulphydryl Groups Reactivity and its Structural Implications

Address: Strada Costiera, 11 I - 34151 Trieste (Italy)

Room: Leonardo da Vinci Building Euler Lecture Hall

Speaker(s): Jonathan Oyebamiji Babalola (Postgraduate School, University of Ibadan, Nigeria )

Support E-Mail: chelaf@ictp.it

Seminar Start Time: 15:30

Europe/Rome Using a thermodynamic interpretation of multifractal spectra we develop a method to analyze time series. We apply it to data from epileptic and healthy patients (electroencephalograms) and show that seizures can be clearly distinguished from spurious data. We also apply it to several examples of financial data showing clearly the appearance of crises. Since the analysis is based only on previous data, it is particularly useful for predictions. ICTP ICTP pio@ictp.it

Seminar

30 Nov 2011

@ ICTP

Condensed Matter and Statistical Physics

Special interdisciplinry seminar: "Extracting crises information from time series"

Address: Strada Costiera, 11 I - 34151 Trieste (Italy)

Room: Leonardo da Vinci Building Luigi Stasi Seminar Room

Speaker(s): Hilda A. CERDEIRA (Universidade Estadual Paulista, Sao Paulo )

Seminar Start Time: 16:00

Europe/Rome The quasi-periodic kicked rotor is a one-dimensional system displaying the same metal-insulator Anderson transition than a usual 3D disordered system. This model can be experimentally realized using a cold atomic gas, allowing for a direct measurement of the temporal dynamics. Accurate measurements of the atomic wavefunction dynamics and the use of finite-size scaling techniques make it possible to measure with a good precision the value of the critical exponent \nu and to test its universality. We also study the spatio-temporal evolution of the wavefunction at the critical point, and show that it is well described at short times by self-consistent theory of localization. At long times - probably not accessible to the present generation of experiments - large deviations are observed, related to the multifractal character of the wavefunctions. ICTP ICTP pio@ictp.it

Seminar

1 Dec 2011

@ ICTP

Condensed Matter and Statistical Physics

Seminar on Disorder and strong electron correlations: "The atomic quasi-periodic kicked rotor: Experimental test of the universality of the Anderson transition, critical behaviour and large fluctuations"

Address: Strada Costiera, 11 I - 34151 Trieste (Italy)

Room: Leonardo da Vinci Building Luigi Stasi Seminar Room

Speaker(s): Dominique DELANDE (Universite' Pierre et Marie Curie, Paris )

Seminar Start Time: 16:00

Seminar

1 Dec 2011

@ ICTP

High Energy Cosmology and Astroparticle Physics , Cosmology

Clustering of dark energy

Address: Strada Costiera, 11 I - 34151 Trieste (Italy)

Room: Leonardo da Vinci Building Euler Lecture Hall

Speaker(s): Guillermo BALLESTEROS (University of Padova)

Seminar Start Time: 16:30

Activity

5 Dec 2011 - 8 Dec 2011

@ Legon - Ghana

Applied Physics

Workshop on Wireless Sensor Networks (WSN) | (smr 2412)

Organizer(s): ICTP, AAU (Association of African Universities) and University of Cape Town

Secretary: S. Tanaskovic

Support E-Mail: arpl@ictp.it

Europe/Rome Abstract. We talk about S-matrix element of one closed string RR field, two open string tachyons and one gauge field in type II superstring theory in brane -anti brane systems. An expansion for the S-matrix element has been found that all leading order terms are exactly reproduced by the symmetric trace tachyon DBI and the Wess-Zumino actions of D-brane-anti-D-brane systems. Using this consistency, we have also found the higher derivative correction to the some of the WZ terms as well. Then we talk about the precise consistency between field theory and string theory tachyon pole of S-matrix element of one RR and three tachyons provided that one takes into account the fact that the tachyon vertex operator in 0 picture to be along the Pauli matrix $\sigma_1$ whereas the tachyon in -1 picture to be along the $\sigma_2$ direction. This internal CP factors must be included in the tachyon DBI part of the effective action. Finally we give some hints for tachyonic effective action for non-BPS branes and BPS brane such that the infinite tachyon/massless poles and the contact terms of amplitudes can be reproduced by the tachyon DBI and the WZ actions, and by their higher derivative corrections. ICTP ICTP pio@ictp.it

Seminar

5 Dec 2011

@ ICTP

High Energy Cosmology and Astroparticle Physics , Strings and Higher Dimensional Theories

On effective actions of non-BPS and BPS branes

Address: Strada Costiera, 11 I - 34151 Trieste (Italy)

Room: Leonardo da Vinci Building Euler Lecture Hall

Speaker(s): Ehsan HATEFI (ICTP)

Seminar Start Time: 14:30

Europe/Rome While the entanglement entropy for one interval in two dimensional CFT is sensible only to the central charge, in the case of many intervals it includes the full operator content of the theory. We make this statement manifest through an OPE expansion valid for any CFT. This general result is tested quantitatively for the compactified boson and the Ising model, where the expressions of the Renyi entropies are derived in terms of Riemann theta functions. Such expressions are checked against numerical data obtained from spin chains. The holographic entanglement entropy for two disjoint intervals in the boundary theory is discussed, also for the time dependent backgrounds given by the Vaidya metrics, which model the black hole formation. ICTP ICTP pio@ictp.it

Seminar

6 Dec 2011

@ ICTP

Condensed Matter and Statistical Physics

Joint ICTP/SISSA Statistical Physics seminar: "Entanglement entropy: Insights from the two intervals case"

Address: Strada Costiera, 11 I - 34151 Trieste (Italy)

Room: Leonardo da Vinci Building Luigi Stasi Seminar Room

Speaker(s): E. TONNI (SISSA)

Seminar Start Time: 11:30

Seminar

6 Dec 2011

@ ICTP

High Energy Cosmology and Astroparticle Physics , Phenomenology of Particle Physics

The four ways of creating dark matter through a portal

Address: Strada Costiera, 11 I - 34151 Trieste (Italy)

Room: Leonardo da Vinci Building Luigi Stasi Seminar Room

Speaker(s): Thomas HAMBYE (University of Brussels, Belgium)

Seminar Start Time: 16:30

Europe/Rome We consider localization of Dirac fermions in graphene with strong scatterers and, more generally, metal-insulator transition in 2D disordered systems with chiral symmetry. A general approach is developed to describe a disordered sample with strong isolated scatterers. This approach provides a basis for an efficient numerical analysis of the charge transport and is applied to calculate the conductivity of undoped graphene with resonant impurities. In the case of smooth resonant scatterers, the symmetry class is identified as DIII and conductivity grows logarithmically with increasing impurity concentration. For vacancies (or strong on-site potential impurities, class BDI), conductivity saturates at a constant value that depends on the vacancy distribution among six sublattices. A general analysis of the metal-insulator transition in 2D system of a chiral symmetry class (AIII, BDI, and DIII) is based on the replica sigma-model formalism. Weak localization corrections to conductivity are absent in all orders of perturbation theory. We identify the non-perturbative contributions due to topological excitations. These excitations have the form of vortices; their dynamics leads to the metal-inculator transition analogous to the Berezinskii-Kosterlitz-Thouless transition in the 2D Coulomb gas. This vortex-driven mechanism becomes ineffective when the system possesses non-trivial topological properties (Wess-Zumino term in class AIII or Z_2 topological term in class CII). This, in particular, explains the lack of localization on the surface of a 3D topological insulator of class CII. ICTP ICTP pio@ictp.it

Seminar

8 Dec 2011

@ ICTP

Condensed Matter and Statistical Physics

Seminar on Disorder and strong electron correlations: "Metal- insulator transition in 2D random fermion systems of chiral symmetry classes"

Address: Strada Costiera, 11 I - 34151 Trieste (Italy)

Room: Leonardo da Vinci Building Luigi Stasi Seminar Room

Speaker(s): Pavel OSTROVSKY (Karlsruhe Institute for Technology)

Seminar Start Time: 11:30

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Activity

Condensed Matter and Statistical Physics

Conference on Research Frontiers in Ultra-Cold Atomic and Molecular Gases | (smr 2274)

Seminar

High Energy Cosmology and Astroparticle Physics , Relativity Cosmology and Astrophysics

Minimal Flavor Violation and the Seesaw

Activity

Condensed Matter and Statistical Physics

15th International Workshop on Computational Physics and Materials Science: Total Energy and Force Methods | (smr 2220)

Hosted Activity

SIS-Sida Carbon Footprint pre-seminar for MENA and EAC | (smr H274)

Activity

Condensed Matter and Statistical Physics

Hands-on Tutorial on Electronic Structure Computations | (smr 2221)

Hosted Activity

"ISO/TC 207/SC 7/WG 2 - GHG management in the value or supply chain" | (smr H272)

Seminar

Condensed Matter and Statistical Physics

Joint ICTP/SISSA Statistical Physics seminar: "Spectra of products of Gaussian random matrices"

Activity

Experts' Meeting on "New online resources to foster Physics and Mathematics education in the developing world" | (smr 2314)

Seminar

Applied Physics

Measurement of stimulated Hawking emission in an analogue system

Activity

Applied Physics

Preparatory School to the Winter College on Optics in Imaging Science | (smr 2222)

Seminar

Condensed Matter and Statistical Physics

Joint ICTP/SISSA Statistical Physics seminar: "Quantum spin Hamiltonian for the SU(2) Wess-Zumino-Witten model"

Seminar

High Energy Cosmology and Astroparticle Physics , Phenomenology of Particle Physics

Gravitino dark matter at the LHC

Seminar

Mathematics

Extremal problems on configuration spaces of linkages

Activity

Applied Physics

Winter College on Optics in Imaging Science | (smr 2223)

Activity

Joint ICTP-TWAS First ICTP Regional Microelectronics Course on VHDL for Hardware Synthesis and FPGA Design in South and Southeast Asia | (smr 2275)

Seminar

Condensed Matter and Statistical Physics

Joint ICTP/SISSA Statistical Physics seminar: "A tunable Bose-Einstein condensate in disordered potentials"

Seminar

Mathematics

DYNAMICAL SYSTEMS SEMINARS - Vector Fields whose linearisation is Hurwitz almost everywhere.

Seminar

Condensed Matter and Statistical Physics

Seminar on Disorder and strong electron correlations: "A steady state thermodynamic entanglement witness"

Seminar

Condensed Matter and Statistical Physics

Joint ICTP/SISSA Statistical Physics seminar: "Discrete parafermions and critical interfaces in the Ashkin-Teller model"

Seminar

Mathematics

JOINT ICTP/SISSA GEOMETRIC ANALYSIS SEMINARS - Translating solitons for symplectic mean curvature flow

Seminar

Condensed Matter and Statistical Physics

Seminar on on Disorder and strong electron correlations: "Quasiparticles and the topological order of the \nu=5/2 state"

Activity

Condensed Matter and Statistical Physics

School on New Trends in Quantum Dynamics and Quantum Entanglement | (smr 2224)

Seminar

Condensed Matter and Statistical Physics

Joint ICTP/SISSA Statistical Physics seminar: "Many-body physics with ultracold gases"

Seminar