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PIRSA:12110082

Entanglement and the Fermi surface

APA

Swingle, B. (2012). Entanglement and the Fermi surface. Perimeter Institute for Theoretical Physics. https://pirsa.org/12110082

Brian Swingle Brandeis University

Talk numberPIRSA:12110082
Source RepositoryPIRSA
Collection

Abstract

In this talk I will describe my work characterizing quantum entanglement in systems with a Fermi surface.  This class includes everything from Fermi liquids to exotic spin liquids in frustrated magnets and perhaps even holographic systems.  I review my original scaling argument and then describe in detail a number of new precise results on entanglement in Fermi liquids.  I will also discuss recent quantum Monte Carlo calculations of Renyi entropies and will argue that we now have a rather complete agreement between theory and numerics for Fermi liquid entanglement.  I will also discuss universal crossovers between thermal and entanglement entropy and a class of solvable interacting models where we can prove the universality of the Widom formula for Fermi surface entanglement.  If there is time, I will comment on several other topics including fluctuations of conserved quantities and connections to holography.