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SUMMARY:Sal Pace (MIT)
DTSTART:20230926T140000Z
DTEND:20230926T150000Z
DTSTAMP:20260423T052456Z
UID:SymSem/40
DESCRIPTION:Title: <a href="https://researchseminars.org/talk/SymSem/40/">
 Emergent generalized symmetries in ordered phases and their spontaneous br
 eaking.</a>\nby Sal Pace (MIT) as part of Symmetry Seminar\n\n\nAbstract\n
 Based on recent work (arXiv:2308.05730) and upcoming work with Chenchang Z
 hu\, Agnès Beaudry\, and Xiao-Gang Wen\, we will discuss (non-)invertible
  higher-form symmetries that emerge in generic ordered phases and their ph
 ysical consequences. Such phases arise from spontaneously breaking an ordi
 nary symmetry G down to a subgroup H\, are described in the deep IR by a n
 onlinear sigma model with target space G/H\, and are ubiquitous to condens
 ed matter and high energy physics. We will focus on two aspects of this st
 ory: (1) when the generalized symmetry is finite\, the fusion higher categ
 ory describing its symmetry defects\, and (2) its spontaneous breaking\, w
 hich drives a phase transition to a nontrivial disordered phase with (non-
 )abelian topological orders and emergent photons. We will present examples
  for different groups G and H and construct lattice and continuum models t
 hat realize the generalized symmetry's spontaneous symmetry-breaking phase
 s.\n
LOCATION:https://researchseminars.org/talk/SymSem/40/
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