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SUMMARY:Andrea Ferrari (Durham)
DTSTART:20221018T140000Z
DTEND:20221018T150000Z
DTSTAMP:20260423T021135Z
UID:SymSem/17
DESCRIPTION:Title: <a href="https://researchseminars.org/talk/SymSem/17/">
 Non-invertible Symmetries and Higher Representation Theory</a>\nby Andrea 
 Ferrari (Durham) as part of Symmetry Seminar\n\n\nAbstract\nThere has rece
 ntly been a lot of excitement surrounding non-invertible global symmetries
  and their potential applications. An important question is how to systema
 tically construct theories whose non-invertible symmetry categories we can
  control well. In this talk I will suggest that higher representation theo
 ry can help us to answer this question when the symmetries are non-intrins
 ically non-invertible. In particular\, I will explain how the topological 
 defects obtained after gauging finite groups and 2-groups in 3 dimensions 
 form the category of 2-representations of the original 2-group\, and how t
 his fact can be applied to some gauge theories with disconnected gauge gro
 ups. The same techniques can be extended to more general higher groups and
  subgroups in higher dimensions.\n
LOCATION:https://researchseminars.org/talk/SymSem/17/
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