CMSP

Europe/Rome 2023-01-31 11:30:00 2023-01-31 12:30:00 CMSP Joint ICTP-SISSA Seminar: Can deep sub-wavelength cavities induce Amperean superconductivity in a 2D material? Gian Marcello Andolina (College de France)     Abstract: Amperean superconductivity is an exotic phenomenon stemming from attractive effective electron-electron interactions (EEEIs) mediated by a transverse gauge field. Originally introduced in the context of quantum spin liquids and high-Tc superconductors, Amperean superconductivity has been recently proposed to occur at temperatures on the order of 1-20 K in two-dimensional, parabolic-band, electron gases embedded inside deep sub-wavelength optical cavities. In this talk, I first generalize the microscopic theory of cavity-induced Amperean superconductivity to the case of graphene and then argue that this superconducting state cannot be achieved in the deep sub-wavelength regime. In the latter regime, indeed, a cavity induces only EEEIs between density fluctuations rather than the current-current interactions which are responsible for Amperean pairing. Zoom registration link will follow in due time. Hybrid Seminar ICTP pio@ictp.it 31 Jan 2023

Europe/Rome 2023-02-02 11:30:00 2023-02-02 12:30:00 CMSP Seminar: Stabilizer Entropy and Quantum Complexity Alioscia Hamma Universita' degli studi di Napoli Federico II Abstract: Quantum physics is inherently different from classical physics and this difference comes in two layers. First, quantum correlations are stronger than classical correlations and do violate Bell’s inequalities. Second, based on the assumption that P is not NP, quantum physics is exponentially harder to simulate than classical physics. The resource that makes quantum computers different from classical computers consists on those operations that go beyond the stabilizer formalism. In this talk, we show a new way of computing non-stabilizerness, called Stabilizer Entropy (SE), and show how this quantity can be experimentally measured. We show how the SE determines the hardness of quantum verification and of simulability, and how in turn it is involved in the onset of quantum complex behavior, as, e.g., revealed in the Out-of-Time-Order correlators. Moreover, we show how SE determines the complexity of a Black Hole and how to retrieve information scrambled by it. Finally, starting from the thermodynamic interpretation of the SE, we sketch a new approach to quantum complexity based on the interplay of entanglement and non-stabilizerness.   ICTP pio@ictp.it 2 Feb 2023

Europe/Rome 2023-02-08 11:00:00 2023-02-08 12:00:00 CMSP Atomistic Simulation Seminar Series: Disruptive ultrafast soft x-ray spectroscopies at the FERMI free electron laser Emiliano Principi (Elettra - Sincrotrone Trieste S.C.p.A.)     Abstract: Significant advances with unconventional extreme ultraviolet (EUV) and soft x-ray spectroscopies have been recently achieved at the FERMI free electron laser in Trieste (Italy).  Time-resolved x-ray absorption spectroscopy (tr-XAS) has been used to explore the sub-picosecond structural and electronic rearrangement in materials under extreme conditions of pressure and temperature driven by intense fs-laser pulses[1]. tr-XAS has been found to be effective also for monitoring the ultrafast charge transfer in photo-excited functional materials[2]. Moreover, it has been successfully employed in combination with impulsive stimulated Raman scattering for revealing the molecular motion in real time with unprecedented elemental and enantiomeric selectivity[3]. High sensitivity to the atomic structure of interfaces in materials has been demonstrated by nonlinear second harmonic spectroscopy in the EUV range[4,5]. This seminar provides an overview on these disruptive experiments carried out at the beamline TIMEX of FERMI, outlining possible challenging developments and future opportunities for scientific research.   [1] Principi, E., Krylow, S., Garcia, M.E., Simoncig, Physical Review Letters 125 ,155703 (2020) [2] Cresi, J.S.P., Principi, E., Spurio, E., Catone et al. Nano Letters 21, 1729 (2021) [3] Mincigrucci R., Rouxel J. R., Rossi B., Principi E. et al. Nature Communications 14, 386 (2023) [4] Lam, R.K., Raj, S.L., Pascal, T.A., Pemmaraju, C.D. et al. Physical Review Letters 120, 023901 (2018) [5] Schwartz, C.P., Raj, S.L., Jamnuch, S., Hull, C.J., et al. Physical Review Letters 127, 096801 (2021) Zoom registration link will follow in due time. Hybrid Seminar ICTP pio@ictp.it 8 Feb 2023

Europe/Rome 2023-01-23 07:00:00 2023-02-03 21:00:00 School on Synchrotron Light Sources and their Applications | (smr 3815) An ICTP online meeting The School will introduce young scientists to the design, operation, and research opportunities offered at a modern synchrotron light source and how such sources are realized.   The school will be held over two weeks and will consist of three modules: (1) the physical aspects concerning the design and function of the main components: accelerators, insertion devices and beamline optics (2) an overview of the arguments that can be made in order to fund and build a synchrotron light source, including socioeconomic benefit, stakeholder engagement, communication (3) Overview of common synchrotron light techniques including synchrotron infrared techniques and XANES/EXAFS.   Topics: Fundamentals of synchrotron radiation from storage rings Fundamentals of X-ray interactions with matter Design and operation of storage rings Beamline design: Photon transport and optics Bending magnets and insertion devices Project management at a large facility Ancillary devices for light sources Socioeconomic justification Cultural heritage Stakeholder engagement/communications Starting up user operations at a new facility Industrial Applications IR microscopy Basics of X-ray crystallography and powder diffraction Basics of structural biology Fundamentals of X-ray absorption: EXAFS and XANES XRF, TXRF, GXRF and their applications in materials and life sciences Tomography Registration: There is no registration fee.   Online - ICTP pio@ictp.it 23 Jan 2023 - 3 Feb 2023

Europe/Rome 2023-03-13 07:00:00 2023-03-24 21:00:00 Conference and Advanced School on Low-Dimensional Quantum Systems | (smr 3820) An ICTP Meeting in presence in Santiago - Chile Low-dimensional quantum systems continue to be an exciting area of research. The frontiers have been continuously pushed forward by fabricating novel materials and developing experimental techniques that provide a gateway for exploring new physics. Examples of such new endeavors include hydrodynamic phenomena in interacting electron systems in ultra-pure materials; driven quantum systems, where strong light-matter interactions can lead to novel states of matter; generation and control of entangled states in low-dimensional devices; emergent correlated phases in novel low-dimensional materials and structures (e.g., twisted graphene). The main goal of this event will be to nurture collaborations and exchange of knowledge among researchers, advanced students and postdocs of different continents and subfields. The activities will highlight recent progress in this area in topics including, but not limited to: Electronic hydrodynamics Driven/dissipative systems and light-matter interaction Low-dimensional devices and disorder Topological systems Emergent phases in novel materials The  “Conference and Advanced School on Low-Dimensional Quantum Systems” will take place in Santiago, Chile, from March 13 to March 24, 2023. The event will combine a set of lectures and talks during the two weeks and will be a meeting point for researchers worldwide. Lecturers: G. FALKOVICH, Weizmann Institute of Science, Israel - “An introduction to hydrodynamics for condensed matter physicists”. A. MIRLIN, KIT, Germany - “Disordered systems” M. TITOV, Radboud University, Netherlands - "Non equilibrium quantum theory: from Schrödinger to Boltzmann equation" B. NAROZHNY, KIT, Germany -  "Graphene hydrodynamics” M. POLINI, Università di Pisa, Italy - "Cavity quantum electrodynamics of atomically thin crystals" Speakers: C. BALSEIRO, Centro Atómico Bariloche and CONICET, Argentina A. BERNEVIG, Princeton University, USA A. CHAVES, Universidade Federal do Ceará, Fortaleza, Brazil C. CORMICK, Universidad Nacional de Córdoba, Argentina D. DULIC, Universidad de Chile, Chile Y. GEFEN, Weizmann Institute of Science, Israel A. FAINSTEIN, Centro Atómico Bariloche and CONICET, Argentina R. FAZIO, ICTP, Italy A. KAMENEV, University of Minnesota, USA M. KISELEV, ICTP, Italy J. KLINOVAJA, University of Basel, Switzerland A. LEVCHENKO, University of Wisconsin–Madison, USA A. LUCAS, University of Colorado, USA J. MAZE, Pontificia Universidad Católica de Chile, Chile P. MELLADO, Universidad Adolfo Ibáñez, Chile F. von OPPEN, Freie Universität Berlin, Germany H. M. PASTAWSKI, Universidad Nacional de Córdoba, Argentina A. PRINCIPI, The University of Manchester, UK T. RAPPOPORT, UFRJ, Brazil S. ROCHE, ICN2 and ICREA, Spain M. RÖSNER, Radboud University, Netherlands D. SHEEHY, Louisiana State University, USA J. SCHMALIAN, KIT, Germany A. STERN, The Weizmann Institute of Science, Israel V. VILDOSOLA, GIyA-CNEA, Argentina Z. ZANOLLI, Utrecht University, Netherlands Venue: Faculty of Mathematical and Physical Sciences (FCFM), Universidad de Chile, Santiago, Chile.   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.   Santiago - Chile ICTP pio@ictp.it 13 Mar 2023 - 24 Mar 2023

Europe/Rome 2023-04-17 08:00:00 2023-04-23 22:00:00 ICTP - Quantinuum Quantum Hackathon | (smr 3829) The call for applications will open soon An ICTP meeting in presence The ICTP-Quantinuum Quantum Hackathon invites 18 international teams of students to the International Centre for Theoretical Physics to learn and develop quantum algorithms and apply them in the context of real-world use-cases with leading industrial partners. Quantum computing is undergoing a long-predicted transition from scientific revolution to industrial reality. Global governments, in partnership with industry, are making major investments in pursuit of quantum-related global goals. As the technology approaches practical implementation, the ICTP and Quantinuum jointly organise a hackathon to contribute to a global education effort around quantum computing. Following a series of lectures by Quantinuum a academic researchers, and workshops on quantum computing and algorithms, students will join scientists and industrial partners to learn how to deploy quantum algorithms focused on industrially-relevant use-cases across multiple sectors, from automotive, chemistry, finance, energy and pharmaceuticals. This multi-industry hackathon aims to accelerate applications of quantum computing, and to ensure that the benefits of this nascent technology are distributed equitably and globally. Topics: Gate-based quantum computing Optimisation, routing and compilation of quantum circuits Quantum algorithms Quantum chemistry Diagrammatic reasoning Compositionality and computational linguistics Quantum hackathon 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.   ICTP ICTP pio@ictp.it 17 Apr 2023 - 23 Apr 2023

Europe/Rome 2023-05-15 08:00:00 2023-05-19 22:00:00 Workshop on Frontiers in Excited State Electronic Structure Methods: from Spectroscopy to Photochemistry | (smr 3836) ICTP ICTP pio@ictp.it 15 May 2023 - 19 May 2023