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SUMMARY:Nathan Seiberg (Institute for Advanced Study)
DTSTART:20230131T193000Z
DTEND:20230131T203000Z
DTSTAMP:20260423T024531Z
UID:nhetc/63
DESCRIPTION:Title: <a href="https://researchseminars.org/talk/nhetc/63/">S
 ymmetries and Anomalies in the Continuum and on the Lattice</a>\nby Nathan
  Seiberg (Institute for Advanced Study) as part of NHETC Seminar\n\n\nAbst
 ract\nBased on joint work with Meng Cheng (arXiv:2211.12543)\, we will dis
 cuss some aspects of global symmetries and their ‘t Hooft anomalies.\n\n
 We will define a notion of an emanant global symmetry. It is not a symmetr
 y of the UV theory\, but unlike emergent (accidental) symmetries\, it is n
 ot violated by any relevant or irrelevant operators in the IR theory.\n\nW
 e will present lattice models with anomalous internal symmetries and see h
 ow the anomalies are diagnosed on the lattice using topological defects.\n
 \nWe will also discuss lattice models with anomalous lattice translation a
 nd relate them to an anomalous emanant symmetry in the IR theory. This wil
 l connect our discussion to the well-known Lieb-Schultz-Mattis theorem and
  to filling constraints like Luttinger theorem.\n
LOCATION:https://researchseminars.org/talk/nhetc/63/
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