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SUMMARY:Horacio Casini (Bariloche Atomic Centre)
DTSTART:20210301T173000Z
DTEND:20210301T184500Z
DTSTAMP:20260404T132228Z
UID:HET/9
DESCRIPTION:Title: <a href="https://stable.researchseminars.org/talk/HET/9
 /">Entropic order parameters for symmetries in QFT</a>\nby Horacio Casini 
 (Bariloche Atomic Centre) as part of Purdue HET\n\n\nAbstract\nIn QFT ther
 e is an algebra of operators attached to any spacetime region. Simple degr
 adations of the most harmonious possible relation between algebras and reg
 ions are shown to encode generalized symmetries. Nets of algebras with the
 se symmetries allow for a non uniqueness of the algebras that can be assig
 ned to a given region. This non uniqueness suggests a simple geometrical o
 rder parameter in terms of a relative entropy. These satisfy a ''certainty
  relation'' connecting the statistics of the order and disorder parameters
  for complementary regions. We describe how the lore about phases of theor
 ies with generalized symmetries is seen in this new picture.\n
LOCATION:https://stable.researchseminars.org/talk/HET/9/
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