Pantheon SEMPARIS Le serveur des séminaires parisiens Paris

Status Confirmed
Seminar Series PT-IHES
Subjects hep-th
Date Thursday 20 June 2024
Time 10:00
Institute IHES
Seminar Room Amphithéâtre Léon Motchane
Speaker's Last Name Kapustin
Speaker's First Name Anton
Speaker's Email Address
Speaker's Institution Caltech et IHES
Title Anomalies on a Lattice
Abstract I will discuss two lattice avatars of ’t Hooft anomalies. The first one involves an action of a symmetry group on observables of a 1d spin system. It is related to a generalization of the Lieb-Schultz-Mattis theorem. The second one concerns symmetries of gapped states of spin systems. I will argue that the Hall conductance and other topological invariants of symmetric gapped states can be interpreted as obstructions to localizing the symmetry even approximately.
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