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SUMMARY:Horacio Casini (Bariloche Atomic Centre)
DTSTART:20210301T173000Z
DTEND:20210301T184500Z
DTSTAMP:20260423T004822Z
UID:HET/9
DESCRIPTION:Title: <a href="https://researchseminars.org/talk/HET/9/">Entr
 opic order parameters for symmetries in QFT</a>\nby Horacio Casini (Barilo
 che Atomic Centre) as part of Purdue HET\n\n\nAbstract\nIn QFT there is an
  algebra of operators attached to any spacetime region. Simple degradation
 s of the most harmonious possible relation between algebras and regions ar
 e shown to encode generalized symmetries. Nets of algebras with these symm
 etries allow for a non uniqueness of the algebras that can be assigned to 
 a given region. This non uniqueness suggests a simple geometrical order pa
 rameter in terms of a relative entropy. These satisfy a ''certainty relati
 on'' connecting the statistics of the order and disorder parameters for co
 mplementary regions. We describe how the lore about phases of theories wit
 h generalized symmetries is seen in this new picture.\n
LOCATION:https://researchseminars.org/talk/HET/9/
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