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SUMMARY:Invertible Field Theories and a Long Exact Sequence in Symmetry Br
 eaking - Cameron Krulewski (Dalhousie University)
DTSTART:20251104T100000Z
DTEND:20251104T113000Z
UID:TALK240457@talks.cam.ac.uk
DESCRIPTION:Deformation classes of fully-extended\, unitary\, invertible f
 unctorial field theories model anomaly SPTs and are computable via techniq
 ues in stable homotopy theory. We use these to study spontaneous symmetry 
 breaking by a charged order parameter. Our framework allows one to study a
 nomaly matching from a bulk to a symmetry defect\, obstructions to forming
  symmetry defects\, and higher Berry phases. I will discuss examples inclu
 ding domain walls for Majorana fermions and the Thouless pump. This talk i
 s based on joint work with Debray\, Devalapurkar\, Liu\, Pacheco-Tallaj\, 
 and Thorngren.
LOCATION:Seminar Room 2\, Newton Institute
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