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PRODID:UW-Madison-Physics-Events
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SEQUENCE:0
UID:UW-Physics-Event-3834
DTSTART:20151103T213000Z
DTEND:20151103T223000Z
DTSTAMP:20260419T110746Z
LAST-MODIFIED:20151102T225121Z
LOCATION:5280 Chamberlin Hall
SUMMARY:Effective field theory for spacetime symmetry breaking\, Theor
 y Seminar (High Energy/Cosmology)\, Toshifumi Noumi\, Hong Kong Univer
 sity of Science and Technology
DESCRIPTION:Spacetime symmetry breaking often appears in condensed mat
 ter physics and cosmology. In contrast to the internal symmetry case\,
  it is known that the number of broken global spacetime symmetries doe
 s not coincide with that of physical Nambu-Goldstone (NG) fields in ge
 neral. Correspondingly\, the coset construction of effective action ha
 s to be implemented with the so-called inverse Higgs constraints to co
 mpensate such a mismatch. In this talk\, I revisit the effective actio
 n construction for spacetime symmetry breaking from the local symmetry
  point of view. Since NG fields are generated by local transformations
  of order parameters\, such a local picture provides a correct identif
 ication of physical NG fields. I will illustrate the importance of the
  local picture and revisit the coset construction. I will also discuss
  applications to condensed matter physics and cosmology.
URL:https://www.physics.wisc.edu/events/?id=3834
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