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SUMMARY:Michael Landry (Columbia University)
DTSTART:20200717T150000Z
DTEND:20200717T160000Z
DTSTAMP:20260423T024623Z
UID:CMU-TP/6
DESCRIPTION:Title: <a href="https://researchseminars.org/talk/CMU-TP/6/">T
 he coset construction for non-equilibrium systems</a>\nby Michael Landry (
 Columbia University) as part of Carnegie Mellon theoretical physics\n\n\nA
 bstract\nWe propose a systematic coset construction of non-equilibrium eff
 ective field theories (EFTs)  governing the long-distance and late-time dy
 namics of relativistic\, finite-temperature  condensed matter systems. Our
  non-equilibrium coset construction makes significant advances beyond more
  standard coset constructions in that it takes advantage of recently-devel
 oped techniques\, which allow the  formulation of non-equilibrium effectiv
 e actions that account for quantum and thermal fluctuations as well as  di
 ssipation. Because these systems exist at finite temperature\, the EFTs li
 ve on the closed-time-path of the Schwinger-Keldysh contour. To demonstrat
 e the legitimacy of this coset construction\, we successfully reproduce th
 e known EFTs for fluids and superfluids at finite temperature. Then\, (tim
 e permitting) to demonstrate its utility\, we construct novel EFTs for sol
 ids\, supersolids\, and four phases of liquid crystals\, all at finite tem
 perature.  We thereby combine the non-equilibrium effective action and the
  coset construction to create a powerful tool that can be used to study ma
 ny-body systems out of thermal equilibrium.\n
LOCATION:https://researchseminars.org/talk/CMU-TP/6/
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