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SUMMARY:Higher form symmetries and superfluids - Diego Hofman (Amsterdam)
DTSTART:20191031T130000Z
DTEND:20191031T140000Z
UID:TALK131107@talks.cam.ac.uk
CONTACT:Dr. Carl Turner
DESCRIPTION:I will describe superfluid hydrodynamics as the hydrodynamic t
 heory of a system with an emergent anomalous higher-form symmetry. The hig
 her-form charge counts the winding planes of the superfluid -- its constit
 utive relation replaces the Josephson relation of conventional superfluid 
 hydrodynamics. This formulation puts all hydrodynamic equations on equal f
 ooting. The anomalous Ward identity can be used as an alternative starting
  point to prove the existence of a Goldstone boson\, without reference to 
 spontaneous symmetry breaking. This provides an alternative characterizati
 on of Landau phase transitions in terms of higher-form symmetries and thei
 r anomalies instead of how the symmetries are realized. This treatment is 
 more general and\, in particular\, includes the case of BKT transitions. 
LOCATION:Potter Room (first floor\, Pav. B)
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