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SUMMARY:Dan Freed (Harvard)
DTSTART:20231017T183000Z
DTEND:20231017T193000Z
DTSTAMP:20260423T022744Z
UID:nhetc/91
DESCRIPTION:Title: <a href="https://researchseminars.org/talk/nhetc/91/">W
 hat is an anomaly?</a>\nby Dan Freed (Harvard) as part of NHETC Seminar\n\
 n\nAbstract\nAnomalies in quantum field theory have been the subject of at
 tention for decades.  In this talk I will dispel some myths: anomalies are
  tied to symmetry\, anomalies are tied to fermionic fields\, etc.  Then I 
 will explain how anomalies--expressed as invertible field theories--are th
 e manifestation of the projectivity of quantum field theory.  My point of 
 view is summarized by a slogan:\n\n            Quantum theory is projectiv
 e.  Quantization is linear.\n
LOCATION:https://researchseminars.org/talk/nhetc/91/
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