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SUMMARY:Meng Cheng (Yale)
DTSTART:20231031T150000Z
DTEND:20231031T160000Z
DTSTAMP:20260423T052449Z
UID:SymSem/42
DESCRIPTION:Title: <a href="https://researchseminars.org/talk/SymSem/42/">
 A defective look at quantum phases of matter</a>\nby Meng Cheng (Yale) as 
 part of Symmetry Seminar\n\n\nAbstract\nI will discuss recent developments
  in the classification and characterization of phases of matter in quantum
  many-body systems\, through the lens of topological defects of global sym
 metry. In the first part\, I will review how gapped phases with spatial sy
 mmetries can be understood using networks of background defects\, and appl
 y the construction to derive topological boundary states of (4+1)d "beyond
 -cohomology" SPT phases. The second part will discuss topological phases i
 n condensed matter systems with quenched disorder. Viewing disordered phas
 es as ensembles of defects\, I will describe a classification scheme of di
 sordered topological phases with exact and average symmetries.\n
LOCATION:https://researchseminars.org/talk/SymSem/42/
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