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SUMMARY:Nonlinear Effective Field Theory of Fermi Liquids
DTSTART:20230306T140000
DTEND:20230306T150000
DTSTAMP:20260430T025721Z
UID:ced208798c9d3989fdf6711279062051fa640fdfd239eb08f3439d4e
CATEGORIES:Conferences - Seminars
DESCRIPTION:Luca Delacretaz (University of Chicago and University of Gene
 va)\nAbstract : Landau's theory of Fermi liquids is a cornerstone of theor
 etical physics. I will show how to formulate Fermi liquid theory as an eff
 ective field theory of bosonic degrees of freedom\, using the mathematical
  formalism of coadjoint orbits. While at the linear level\, this theory re
 duces to existing multidimensional bosonization approaches\, it necessaril
 y features nonlinear corrections that are fixed by the geometry of the Fer
 mi surface. These are crucial to reproduce nonlinear response\, such as hi
 gher-point functions of currents. The effective field theory framework fur
 thermore systematically parametrizes corrections to Fermi liquid behavior\
 , and provides a computationally advantageous approach for non-Fermi liqui
 ds -- strongly interacting fixed points obtained by deforming Fermi liquid
 s with relevant interactions.
LOCATION:BSP 727 https://plan.epfl.ch/?room==BSP%20727
STATUS:CONFIRMED
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