CMSP

Europe/Rome 2019-03-26 11:00:00 2019-03-26 12:00:00 Condensed Matter Seminar: Magnetic Effect in the Functioning of Hemoglobin ICTP ICTP pio@ictp.it 26 Mar 2019

Europe/Rome 2019-04-11 11:00:00 2019-04-11 12:00:00 Joint ICTP/SISSA Statistical Physics Seminar: Seeing Beyond the Light: Vision and Photon Electrodynamics in Quantum Spin Ice PLEASE NOTE UNUSUAL DAY FOR JOINT SP SEMINARS Understanding the nature and behaviour of excitations in quantum spin liquids, and in topological phases of matter in general, is of fundamental importance and has proven crucial for experimental detection and characterisation of candidate materials. Current theoretical and numerical techniques, however, have limited capabilities, especially when it comes to studying gapped excitations. In this talk, I will discuss a semiclassical numerical method, based on a large-$S$ path integral approach, to study systems whose spin liquid behaviour is underpinned by perturbative ring-exchange Hamiltonians. The method can readily access both thermodynamic and spectral properties. I will focus in particular on quantum spin ice and its photon and vison excitations. After benchmarking the method against existing results on photons, I will show how it can be used to characterise visons and their thermodynamic behaviour. We find that visons form a weak electrolyte -- in contrast to spinons in classical spin ice. That is, vison pairs are the dominant population at low temperatures. This is reflected in the behaviour of thermodynamic quantities, such as pinch point motifs in the relevant correlators. Moreover, visons appear to strongly hybridise with the photon background, a phenomenon that likely affects the way these quasiparticles may show up in inelastic response measurements. I will conclude with a brief discussion of the significance of our results and an outlook on further applications of our method. ICTP ICTP pio@ictp.it 11 Apr 2019

Europe/Rome 2019-04-16 11:00:00 2019-04-16 12:00:00 Joint ICTP/SISSA Statistical Physics Seminar: The Paradigm of Jamming: From Low-Temperature Glasses to Machine Learning and More The jamming transition in packings of hard particles is of fundamental interest in the physics of granular materials and glasses. In recent years the physics of jamming has gained momentum in several interdisciplinary contexts, going from Machine Learning to Inference, Ecology and beyond. I will introduce the Simplest Model of Jamming and show how jammed points share peculiar critical properties, highly universal and deeply related glass physics. After discussing the implications of the vicinity to jamming in a glassy phase, I will consider the problem of Information Storage in Machine Learning. Going from the single neuron to multilayer networks, the capacity limit becomes a jamming point. ICTP ICTP pio@ictp.it 16 Apr 2019

Europe/Rome 2019-05-07 11:00:00 2019-05-07 12:00:00 Joint ICTP/SISSA Statistical Physics Seminar: To be announced SISSA, Via Bonomea 265 ICTP pio@ictp.it 7 May 2019

Europe/Rome 2019-04-29 08:00:00 2019-05-04 22:00:00 Conference on Quantum Measurement: Fundamentals, Twists, and Applications | (smr 3285) TO ALL PARTICIPANTS Finalization of the  Conference programme is in progress. In the meantime, for travel/accommodation arrangements, please consider that the activity will start in the morning of Monday 29th April, and should end on Saturday 4th May within lunch time, tentatively. Therefore, it is suggested to consider arrival on Sunday 28th April, and departure either on Saturday evening 5th May, or on Sunday 6th May, directly. * * * IMPORTANTE NOTICE: SCAM ALERT!   ICTP has been reported cases of unsolicited phone calls from a travel agency pretending to make hotel reservations on behalf of the Conference: Please do NOT disclose any sensitive information, it is a fraudulent attempt to collect credit card data. ICTP does not operate through external agencies nor contacts invitees via phone calls for accommodation purposes, and ICTP does not request credit card data.   - - -   This conference will address recent theoretical and experimental developments in quantum measurement, underscoring common themes from the perspectives of foundations of quantum mechanics, quantum information processing, quantum optics, condensed matter physics and metrology. Rooted in the early history of quantum mechanics, the field of Quantum Measurement has evolved from a purely mathematical formulation to an active research topic, embedded in a broad spectrum of subfields, ranging from quantum optics to condensed matter physics. It involves a variety of techniques, including quantum limited, fast, non-invasive measurements. As a versatile tool in an advanced quantum toolbox, quantum measurements could be empowered for the design of novel protocols, including active and passive error correction codes, quantum feedback control, precision measurements, quantum state discrimination, quantum metrology, quantum simulations and more. In this context of diversified research, this meeting will bring together expert theorists and experimentalists, employing different facets of quantum measurement, with the goal of identifying common themes, and cross-fertilizing with new ideas. A Poster Session will also be organized, and interested candidates are invited to upload a short abstract of their proposed posters during the online application process (max. half page, in pdf format). Poster presentation is not mandatory, however participants are encouraged to present their results.   Topics      Foundations of quantum mechanics     Quantum measurement in information processing     Quantum measurements in nanodevices     Quantum measurement and thermodynamics     Quantum metrology and precision measurements   Speakers  A. ACIN, ICFO, Spain Y. AHARONOV, Tel Aviv University, Israel A. AUFFEVES, Institute Neel, France M. BARBIERI, Università Roma Tre, Italy W. BELZIG, Konstanz University, Germany P. BERTET, SPEC / CEA Saclay, France Y. BLANTER, Delft University, the Netherlands R. CHAVES, Institute of Physics Natal, Brasil M. DEVORET, Yale University, USA R. EGGER, University of Dusseldorf, Germany J. EISERT, Freie Universitaet Berlin, Germany K. ENSSLIN, ETH, Switzerland M. GENOVESE, INRIM, Italy I. GORNI, KIT, Germany B. HUARD, LPA CNRS, France A. JORDAN, University of Rochester, USA E. KARIMI, Ottawa University, Canada A. KOROTKOV, University of California, Riverside, USA E. LAIRD, Lancaster University, UK I. LERNER, University of Birmingham, UK E. LUTZ, Stuttgart University, Germany F. MARQUARDT, MPI Erlangen, Germany M. MITCHELL, ICFO, Spain K. MURCH, Washington University in St. Louis, USA A. NITZHAN, University of Pennsylvania, USA M. SEGEV*, Technion, Israel I. SIDDIQI, UC Berkley, USA K. SNIZHKO, Weizmann Institute of Science, Israel A. STEINBERG, University of Toronto, Canada M. UEDA, University of Tokyo, Japan L. VAIDMAN, Tel Aviv University, Israel V. VEDRAL, University of Oxford, UK R. VIJAY, Tata Institute of Fundamental Research, India H. WISEMAN, Griffith University, Australia O. ZILBERBERG, ETH, Switzerland * to be confirmed   A limited number of grants are available to support the attendance of selected participants, with priority given to participants from developing countries. There is no registration fee. Online application is open until 10 February 2019. - - - Secretariat: smr3285@ictp.it ICTP ICTP pio@ictp.it 29 Apr 2019 - 4 May 2019

Europe/Rome 2019-05-06 08:00:00 2019-05-17 22:00:00 School and Workshop on Patterns of Synchrony: Chimera States and Beyond | (smr 3286) The study of nonlinear systems continues to yield new and fascinating phenomena. Recently, a striking development has emerged in complex systems research: bringing together concepts from statistical and nonlinear physics allowed for the prediction and discovery of a novel effect,  called the chimera state.  Chimera states are a nice example of unexpected, counterintuitive dynamics where the interplay of synchronization, long-range interactions and pattern formation mechanisms are essential. The aim of the school is to review the progress in this field, where physics and applied mathematics strongly overlap with life sciences; find new interconnections and general analytic, numerical, and statistical approaches; and identify novel directions and cross-disciplinary applications. The targeted audience includes advanced undergraduate and PhD students, as well as post-doctoral fellows and junior researchers. Special attention will be devoted to the training of scientists from developing countries in line with the fundamental mission of the AS-ICTP.   The workshop brings together a mix of world-leading experts in the field and young researchers to cover most important recent achievements in understanding of complex structures and the nature of synchrony in nonequilibrium systems. TOPICS:   Synchronization Patterns Networks Chimera states Spatio-temporal complexity Long-range interactions Multistability Active matter Nonlinear waves GRANTS:   A limited number of grants are available to support the attendance of selected participants, with priority given to participants from developing countries. There is no registration fee. DEADLINE: For applications needing financial support and/or visa: February 28,  2019 For applications not needing financial support and/or visa: March 15, 2019 ICTP ICTP pio@ictp.it 6 May 2019 - 17 May 2019

Europe/Rome 2019-05-07 08:00:00 2019-05-15 22:00:00 School on Advances in Condensed Matter Physics: New Trends and Materials in Quantum Technologies | (smr 3287) The School aims at bringing together new ideas, novel results, problems and prospects of modern condensed matter physics with special focus on quantum technologies. The latter is new and advanced area of physics and engineering, based on the use some of the phenomena in quantum mechanics, such as quantum entanglement, quantum superposition and quantum tunneling and interference effects for practical applications such as quantum computing, quantum sensing, quantum cryptography, high precision quantum metrology and quantum imaging. This will be done by presenting series of lectures for the broad auditorium of young researchers (e.g. Master and PhD students, young postdocs and research associates), as well as senior scientists from developing countries working on different areas of condensed matter physics, material science, and statistical and chemical physics. Invited lecturers will be world-wide well-known experts on the above topics. The lectures to be presented will be focused on most advanced topics of condensed matter physics which are relevant to novel materials for energy conversion, quantum information and medical applications. The goal of the lectures will be twofold, educational and expert-level discussions of novel results. The latter will be done both during the panel lectures and informal seminars. Topics: • Graphene, two-dimensional materials and their heterostructures; • Majorana fermions; • Topological insulators; • Quantum hall effect; • Novel superconducting materials; • Quantum entanglement and quantum computing; • Quantum networks and their applications; • Quantum optics and cold atoms; • Quantum metrology Invited speakers: A. Akhmerov   (Delft University of Technology, The Netherlands) G. Casati    (University of Insubria, Italy) A.H. Castro Neto (National University of Singapore) R. Fazio    (The Abdus Salam ICTP, Italy) K. Flensberg    (Niels Bohr Institute, Denmark) Y. Gefen    (Weizmann Institute, Israel) A. Geim  (The University of Manchester, U.K.) L. Glazman    (Yale University, U.S.A.) M. Katsnelson    (Radboud University Nijmegen, The Netherlands) A.H. MacDonald (University of Texas at Austin) C. Marcus (University of Copenhagen, Denmark) T. Martin    (Aix-Marseille University, France) L. Molenkamp  (University of Wurzburg, Germany) F. Von Oppen    (Free University of Berlin, Germany) Y. Oreg    (Weizmann Institute, Israel) F. Peeters    (University of Antwerp, Belgium) S. Sachdev  (Harvard University, U.S.A.) A. Stern    (Weizmann Institute, Israel) Further information may be obtained from the poster and at http://acmp2019.las.uz/ Deadline: 1st February 2019 Samarkand - Uzbekistan ICTP pio@ictp.it 7 May 2019 - 15 May 2019

Europe/Rome 2019-05-27 08:00:00 2019-06-07 22:00:00 School and Conference on Complex Quantum Systems out of Equilibrium in Many-Body Physics and Beyond | (smr 3295) The first week of this activity (May 27-31) will consist of introductory lectures aimed at graduate students, postdocs, and junior researchers. Topics include – far from equilibrium physics, many-body coherent dynamics, Anderson and many-body localization, and quantum information processing from many-body physics perspective. In the second week (June 3-7), we will have conference-style talks on these subjects as well as on a broader array of topics at the forefront of modern research in condensed matter physics and related areas. Additional subjects include quantum gases, superconductivity and superconducting qubits, topological states of matter, integrable systems, low-dimensional physics, disordered systems, quantum thermodynamics, driven and driven-dissipative dynamics etc. Further information is available on poster below. NEW DEADLINE for applicants not requesting financial support: 17th March 2019 Yerevan - Armenia ICTP pio@ictp.it 27 May 2019 - 7 Jun 2019