CMSP

Europe/Rome 2018-06-18 11:00:00 2018-06-18 12:00:00 Joint ICTP/SISSA Statistical Physics Seminar: Partial Time-reversal Transformation and Entanglement Negativity in Fermionic System The partial transpose of density matrices in many-body systems has been known as a good candidate to diagnose quantum entanglement of mixed states. In particular, it can be used to define the (logarithmic) entanglement negativity for bosonic systems. In this talk, I introduce partial time-reversal transformation as an analog of partial transpose for fermions. This definition naturally arises from the spacetime picture of partially transposed density matrices in which partial transpose is equivalent to reversing the arrow of time for one subsystem relative to the other subsystem. I show the success of this definition in capturing the entanglement of fermionic symmetry-protected topological phases as well as conformal field theories in (1+1) dimensions. SISSA, Via Bonomea 265, rm 128 ICTP pio@ictp.it 18 Jun 2018

Europe/Rome 2018-06-19 11:00:00 2018-06-19 12:00:00 Joint ICTP/SISSA Statistical Physics Seminar - Nanomotors: Symmetry, Chemotaxis, Sedimentation and Anisotropy Models for active matter have brought a new type of experiments in statistical physics where the source of nonequilibrium lies within the particles themselves or on their surface. In this talk, I will take the viewpoint of molecular simulations to study matching experiments on chemically-powered nanomotors: self-propulsion by symmetry-breaking, chemotaxis, sedimentation and anisotropic nanomotors. I will comment on the design of consistent microscopic models with respect to energy conservation, to chemical kinetic, and to thermal fluctuations. As a perspective, I will discuss enzyme nanomotors. On the one hand, they consist in elaborate catalytic devices with interesting thermodynamic properties and on the other hand they might inspire or serve as molecular scale machine for nano- and bio-technology in the coming years. SISSA, Via Bonomea 263, room 128 ICTP pio@ictp.it 19 Jun 2018

Europe/Rome 2018-07-03 11:00:00 2018-07-03 12:00:00 Joint ICTP/SISSA Statistical Physics Seminar: Quantum Integrated Information Theory Integrated Information Theory (IIT) has emerged as one of the leading research lines in computational neuroscience to provide a mechanistic and mathematically well-defined description of the neural correlates of consciousness. Integrated Information quantifies how much the integrated cause/effect structure of the global neural network fails to be accounted for by any partitioned version of it. The holistic IIT approach is in principle applicable to any information-processing dynamical network regardless of its interpretation in the context of consciousness. In this talk I will describe the first steps towards a possible formulation of a general and consistent version of IIT for interacting networks of quantum systems irrespective of potential applications to consciousness. A variety of different phases, from the dis-integrated to the holistic one can be identified and their cross-overs studied. ICTP ICTP pio@ictp.it 3 Jul 2018

Europe/Rome 2018-07-17 11:00:00 2018-07-17 12:00:00 Joint ICTP/SISSA Statistical Physics Seminar: Area-Law and Universality in the Statistics of the Subsystem Energy Abstract: Consider a quantum chain in its ground state and then take a subdomain of this system with natural truncated hamiltonian. Since the total hamiltonian does not commute with the truncated hamiltonian the subsystem can be in one of its eigenenergies with different probabilities. Since the global energy eigenstates are locally close to diagonal in the local energy eigenbasis we argue that the Shannon(Renyi) entropy of these probabilities follows an area-law for the gapped systems. When the system is at the critical point the Shannon(Renyi) entropy follows a logarithmic behaviour with a universal coefficient. Our results show that the Shannon(Renyi) entropy of the subsystem energies closely mimics the behaviour of the entanglement entropy in quantum chains. We support the arguments by detailed numerical calculations performed on the transverse field XY-chain. ICTP ICTP pio@ictp.it 17 Jul 2018

Europe/Rome 2018-07-09 08:00:00 2018-07-13 22:00:00 Conference on Physics of Defects in Solids: Quantum Mechanics Meets Topology | (smr 3221) Goals and brief description of the conference Defects in crystalline solids are ubiquitous. It is the second law of thermodynamics that gives rise to the appearance of a certain amount of disorder in crystalline materials at finite temperatures. Moreover, defects can be present in synthetic materials well above the equilibrium concentration due to the imperfections of material production processes or due to the exposure of the system to irradiation with energetic particles. Such lattice imperfections have a strong influence on the electronic, optical, thermal, and mechanical properties of the solids, normally deteriorating their characteristics. However, defects not always have detrimental effects on material properties, with the most prominent example being the doping of semiconductors by controllable introduction of impurities using ion implantation. In general, treatments of solids with beams of energetic ions and electrons have been shown to be a very powerful tool for the post-synthesis tailoring of material characteristics. The goal of the conference is to bring together active researchers in the field, as well as several experts in the related areas, to discuss "state of the art" in theory and experiment dealing with the physics of defects in solids. The effects of impurities and point/line defects on various properties of solids will be addressed, and the attendees will be able to learn not only the experimental facts, but also understand how the defects are treated within the framework of computational and analytical methods in theoretical physics. Particular attention is going to be paid to defects in nanomaterials, as the reduced dimensionality strongly affects their behavior. The Program will include about 20 oral presentations given by invited speakers, a poster session, and a limited number of short talks selected from contributed abstracts. Topics to be addressed Modern techniques (Raman spectroscopy, STM, XPS, TEM, etc.) used to assess concentration of defect in solids and identify their types First-principles modeling of native defects and impurities Ion and electron irradiation-induced defects Simulations of ion impacts onto solids Defects in superconductors Defects in low-dimensional materials (graphene, inorganic 2D materials, nanotubes etc.) Topological defects Defects for quantum computing Tutorial The conference will be preceded by a half-day tutorial where an introduction to the techniques used to characterize the defects will be given, along with the modern computational techniques used to get theoretical insights into defect behavior. List of invited speakers and lecturers at the tutorial:   U. BANGERT, University of Limerick, Ireland P. BØGGILD, DTU Nanotech, Denmark D. EFREMOV, IFW, Dresden, Germany D. GOLBERG, Queensland University of Technology, Australia A. JORIO, Universidade Federal de Minas Gerais, Brazil K. KAASBJERG, Danish Technical University, Denmark H. KOMSA, Aalto University, Finland J. KOTAKOSKI, University of Vienna, Austria G. LEE, Seoul National University, South Korea V. MEUNIER, Rensselaer Polytechnic Institute, USA T. MICHELY, University of Köln, Germany M. NASTASI, University of Nebraska at Lincoln, USA J. NEUGEBAUER, Max-Planck-Institut für Eisenforschung, Germany L. PIZZAGALLI, CNRS, France M. SCARDAMAGLIA, University of Mons, Belgium M. SCHLEBERGER, Duisburg-Essen University, Germany G. SEIFERT, TU Dresden, Germany K. SUENAGA, AIST, Japan T. SUSI, University of Vienna, Austria A. VANTOMME, KU Leuven, Belgium B. YAKOBSON, Rice University, USA     Several additional invited speakers will be selected from the submitted abstracts. If the applicant wants his/her abstract to be included in the Conference book of abstracts, it should also be submitted as a Word file using a template posted at https://defectsinsolids.files.wordpress.com/2018/02/abstract_template2.docx 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. Deadlines 31 March 2018 for those who need visa 15 April 2018 otherwise --- Please visit also https://defectsinsolids.wordpress.com/ ICTP ICTP pio@ictp.it 9 Jul 2018 - 13 Jul 2018

Europe/Rome 2018-08-06 08:00:00 2018-08-17 22:00:00 Advanced School and Workshop on Correlations in Electron Systems – from Quantum Criticality to Topology | (smr 3232) The Abdus Salam International Centre for Theoretical Physics (ICTP, Trieste, Italy) in collaboration with the Gordon and Betty Moore Foundation, the Institute for Complex Adaptive Matter (ICAM-I2CAM), the National High Magnetic Field Laboratory, and the Department of Physics - University of Florida is organizing the School and Workshop on “Strongly Correlated Electronic Systems - from Quantum Criticality to Topology”.                             Topics Novel theories of quantum criticality in metals and Mott insulators Superconductivity and competing orders  Novel approaches to spin liquids Correlated systems with strong spin-orbit coupling Coulomb interaction in topological systems Topological superconductors  This School and Workshop will bring graduate and postdoctoral students in condensed matter physics together with experts in the field to discuss and the existing challenges and the latest theoretical and experimental developments in correlated electron systems and in topological materials . The research talks will be held mostly during the first week (Aug. 6-10). On Friday, August 10, we will hold a mini-workshop entitled "Fermions: heavy, topological, and critical".  The tutorial lectures on various aspects of strongly correlated and topological electron systems will be given during the second week (Aug. 13-17). ICTP ICTP pio@ictp.it 6 Aug 2018 - 17 Aug 2018

Europe/Rome 2018-08-27 08:00:00 2018-09-14 22:00:00 Summer School on Collective Behaviour in Quantum Matter | (smr 3235) NEW DEADLINE FOR REQUESTING FINANCIAL SUPPORT: 20 April 2018 This School, aimed at graduate students and junior researchers, aims to teach a modern course in condensed matter and statistical physics. It combines basic concepts with recent structural and interdisciplinary developments. It features a combination of theory and computational courses, and seminars on experimental progress in the field. TOPICS: The program will cover a broad variety of topics within condensed matter physics, emphasizing connections with related fields such as quantum information, atomic, optical and high-energy physics:   1. Statistical Mechanics: from foundations to quantum information 2. Numerical methods: high-level programming and advanced numerical methods 3. Coherent dynamics: entanglement, decoherence, phase transitions, driven systems 4. Topological quantum matter: phases and diagnostics 5. Physical implementations: cold atoms, trapped ions, nanophysics, materials. SPEAKERS: F.  Alet (CNRS, Toulouse, France) E.  Andrei (Rutgers University, US) B.  Beri (University of Cambridge, UK) I.  Bloch (MPQ, Garching, Germany) P.  Calabrese (SISSA, Trieste, Italy) J.  Chalker (University of Oxford, UK) X.  Chen (Caltech, US) J.   Dalibard (Collège de France, Paris, France) M.  Devoret (Yale University, US) D.  Dhar (Indian Institute of Science Education and Research, Pune) M.  Heyl (MPIPKS Dresden, Germany) D.  Huse (Princeton, US)* V.  Khemani (Harvard University, US) W.  Krauth (Ecole Normale Superieure, Paris, France) B.  Lake (Berlin Technical University, Germany) C.  Laumann (Boston University, US) A.  Lazarides (MPIPKS Dresden, Germany) A.  MacKenzie (MPI-CPfS Dresden, Germany) E.   Martinez (University of Copenhagen, Denmark) U.  Schollwoeck (LMU Munich, Germany) M.  Znidaric (University of Ljubljana, Slovenia)   *to be confirmed HOW TO PARTICIPATE: Fill in the online application form using the link "Apply here" that can be found on the sidebar of this page. NEW  DEADLINES: - FOR PARTICIPANTS REQUESTING FINANCIAL SUPPORT: 20 April 2018 - FOR PARTICIPANTS NOT REQUESTING FINANCIAL SUPPORT: 14 May 2018     ICTP ICTP pio@ictp.it 27 Aug 2018 - 14 Sep 2018

Europe/Rome 2018-10-15 08:00:00 2018-10-19 22:00:00 Ethiopian Regional Workshop on Solar Energy and Energy Storage Technologies: Materials, System Design, and Applications | (smr 3149) Addis Ababa - Ethiopia ICTP pio@ictp.it 15 Oct 2018 - 19 Oct 2018