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SUMMARY:Nathan Seiberg (IAS)
DTSTART:20230124T150000Z
DTEND:20230124T160000Z
DTSTAMP:20260423T021139Z
UID:SymSem/26
DESCRIPTION:Title: <a href="https://researchseminars.org/talk/SymSem/26/">
 Symmetries and Anomalies in the Continuum and on the Lattice</a>\nby Natha
 n Seiberg (IAS) as part of Symmetry Seminar\n\n\nAbstract\nBased on joint 
 work with Meng Cheng (arXiv:2211.12543)\, we will discuss some aspects of 
 global symmetries and their ‘t Hooft anomalies.\nWe will define a notion
  of an emanant global symmetry.  It is not a symmetry of the UV theory\, b
 ut unlike emergent (accidental) symmetries\, it is not violated by any rel
 evant or irrelevant operators in the IR theory. \nWe will present lattice 
 models with anomalous internal symmetries and see how the anomalies are di
 agnosed on the lattice using topological defects.\nWe will also discuss la
 ttice models with anomalous lattice translation and relate them to an anom
 alous emanant symmetry in the IR theory.  This will connect our discussion
  to the well-known Lieb-Schultz-Mattis theorem and to filling constraints 
 like Luttinger theorem.\n
LOCATION:https://researchseminars.org/talk/SymSem/26/
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