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DTSTART;TZID=Europe/Paris:20230905T140000
DTEND;TZID=Europe/Paris:20230905T153000
DTSTAMP:20260422T125638
CREATED:20230905T082109Z
LAST-MODIFIED:20230905T082109Z
UID:9192-1693922400-1693927800@fermi.univ-tlse3.fr
SUMMARY:Deux modèles de spin aux propriétés inattendues - (Haruki Watanabe / LPT / Seminar). - 05/09/2023\, 14H
DESCRIPTION:Haruki Watanabe (EUniversité de Tokyo) \nSeminar LPT\, 05/09/2023\, 14H\, 3R1\, seminar room\, 3rd floor \nSummary : \nIn this talk\, I will introduce two series of simple spin models with unusual properties. The first one is a modified Toric code that may have a unique ground state under periodic boundary condition\, despite its nontrivial topological order dictated by nontrivial entanglement entropy and anyonic excitations. The second one is a spin chain in which a U(1) symmetry may be spontaneously broken at T=0\, although naively such a phase is prohibited by the Hohenberg-Mermin-Wagner theorem. These examples will help our general understanding of quantum many-body systems and complete classification of possible phases of matter.
URL:https://fermi.univ-tlse3.fr/event/deux-modeles-de-spin-aux-proprietes-inattendues-haruki-watanabe-lpt-seminar-05-09-2023-14h/
LOCATION:salle de séminaire 3ème étage\, Bâtiment 3r1 Université Toulouse III\, Toulouse\, 31400\, France
CATEGORIES:Events,LPT,Seminars
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