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DTSTART;TZID=Europe/Paris:20260907T000000
DTEND;TZID=Europe/Paris:20260911T235959
DTSTAMP:20260611T112251Z
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UID:10000197-1788739200-1789171199@sfp-alpes.fr
SUMMARY:Recent Advances in Quantum Integrable Systems 2026 (RAQIS)
DESCRIPTION:The conference aims at bringing in contact people working on various aspects of Quantum Integrable Systems\, including applications to Statistical Physics\, Condensed Matter and Field Theories.\nThe registration to the conference can be done through the website https://indico.in2p3.fr/event/38960/ \n\nIt will be closed on July 31th\, 2026. \nNote also that the early fees period will end by the end of June 2026. \nFees include lunches\, conference banquet and coffea breaks.\n_\n\nContact : raqis@lapth.cnrs.fr
URL:https://sfp-alpes.fr/event/recent-advances-in-quantum-integrable-systems-2026-raqis/
LOCATION:LAPTh – Auditorium\, 9\, chemin de Bellevue\, Annecy\, 74940\, France
CATEGORIES:Conférence,Evènements
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DTSTART;TZID=Europe/Paris:20260911T110000
DTEND;TZID=Europe/Paris:20260911T120000
DTSTAMP:20260903T154443Z
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UID:10000239-1789124400-1789128000@sfp-alpes.fr
SUMMARY:William FAUGNO (LKB)
DESCRIPTION:Topology in the Many-Body Spectrum: A Spectral Localizer Approach to Quantum Scars\nRésumé : \nTopological phases\, both single-particle and many-body\, are often formulated through momentum-space invariants\, many of which rely on the presence of a spectral gap. However\, disorder and gapless spectra can make these conventional approaches difficult to apply. The spectral localizer provides an alternative real-space framework for defining and characterizing topology in such settings. By combining the Hamiltonian with position operators\, it constructs a pseudospectrum that can identify topologically protected states while simultaneously providing a measure of their spectral stability. The spectral localizer has been successfully applied to a variety of single-particle systems\, including disordered and gapless systems. In this seminar\, I will present recent work extending the spectral localizer to many-body systems. Our construction provides a general pseudospectral framework for identifying topologically protected states throughout the many-body spectrum. We have used this framework to identify candidates for quantum many-body scarring in both an interacting chiral bosonic chain and the PXP model\, demonstrating that the approach is not tied to a particular microscopic mechanism for scarring. The many-body spectral localizer thus provides new insight into the structure and stability of these anomalous ETH-violating states\, while offering a quantitative measure of their stability. Finally\, I will discuss the implications of this framework for quantum error-correcting codes constructed from quantum many-body scar subspaces. \nContact : jeanne.colbois@neel.cnrs.fr \nLe séminaire théorie est financé par la fédération de recherche Quantalps.
URL:https://sfp-alpes.fr/event/william-faugno-lkb/
LOCATION:LPMMC – salle Roger Maynard (G421)\, CNRS - LPMMC 25 avenue des Martyrs\, Grenoble\, 38042\, France
CATEGORIES:Séminaire
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