Quantum Encounters Seminar -- Quantum Information, Condensed Matter, Quantum Field Theory

Nonlinear Effective Field Theory of Fermi Liquids

by Prof. Luca Delacretaz (University of Chicago)

Europe/Paris
Salle de conférences du Bâtiment Alix et Marwan Lahoud (IHES)

Salle de conférences du Bâtiment Alix et Marwan Lahoud

IHES

Le Bois-Marie 35, route de Chartres 91440 Bures-sur-Yvette
Description

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.

Participer à la réunion Zoom
https://us02web.zoom.us/j/87394591389?pwd=bFVaZHltckVaOXpZY1YrdWVVZUtHdz09

ID de réunion : 873 9459 1389
Code secret : 573006

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Organized by

Vasily Pestun & Slava Rychkov