Pantheon SEMPARIS Le serveur des séminaires parisiens Paris

Status Confirmed
Seminar Series PT-IHES
Subjects cond-mat,hep-th,quant-ph
Date Tuesday 7 June 2022
Time 16:00
Institute IHES
Seminar Room Salle de conférences du Bâtiment Alix et Marwan Lahoud
Speaker's Last Name Delacretaz
Speaker's First Name Luca
Speaker's Email Address
Speaker's Institution University of Chicago
Title Nonlinear Effective Field Theory of Fermi Liquids
Abstract Landau's theory of Fermi liquids is a cornerstone of theoretical physics. I will show how to formulate Fermi liquid theory as an effective field theory of bosonic degrees of freedom, using the mathematical formalism of coadjoint orbits. While at the linear level, this theory reduces to existing multidimensional bosonization approaches, it necessarily features nonlinear corrections that are fixed by the geometry of the Fermi surface. These are crucial to reproduce nonlinear response, such as higher-point functions of currents. The effective field theory framework furthermore systematically parametrizes corrections to Fermi liquid behavior, and provides a computationally advantageous approach for non-Fermi liquids -- strongly interacting fixed points obtained by deforming Fermi liquids with relevant interactions.
arXiv Preprint Number

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