Cornell University

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LEPP Theory Seminar: Antony Speranza, University of Maryland

Tuesday, November 14, 2017 at 2:00pm

Physical Sciences Building, 438
245 East Avenue

Edge Modes and Entanglement in Diffeomorphism-invariant Theories

Abstract:The Hilbert space of a theory with diffeomorphism symmetry does not factorize into spatial subregions due to gauge constraints.  This presents a challenge for defining a notion of entanglement entropy associated with a subregion in these theories.  In this talk, I will describe the extended phase space method of Donnelly and Freidel for handling this nonfactorization.  It involves introducing edge modes living at the boundary of the subregion, whose purpose is to restore the diffeomorphism invariance that was broken by the subregion's presence.  These edge modes are then expected to contribute to the subregion's entanglement entropy.  I will further discuss the relevance of the edge mode entanglement to the entropy of black holes, where it may provide a statistical interpretation of the Wald entropy within the low energy effective description. 

Event Type



CHESS, Physics, LEPP

Contact E-Mail

Contact Name

Ryan McCarty

Contact Phone



Antony Speranza

Speaker Affiliation

University of Maryland

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