Extractable entanglement from a Euclidean hourglass

Authors

Takanori Anegawa, Osaka University
Norihiro Iizuka, Osaka University
Daniel Kabat, CUNY Lehman CollegeFollow

Document Type

Article

Publication Date

2022

Abstract

We previously proposed that entanglement across a planar surface can be obtained from the partition function on a Euclidean hourglass geometry. Here we extend the prescription to spherical entangling surfaces in conformal field theory. We use the prescription to evaluate log terms in the entropy of a conformal field theory in two dimensions, a conformally coupled scalar in four dimensions, and a Maxwell field in four dimensions. For Maxwell we reproduce the extractable entropy obtained by Soni and Trivedi. We take this as evidence that the hourglass prescription provides a Euclidean technique for evaluating extractable entropy in quantum field theory.

Comments

This article was originally published in Physical Review D, available at https://doi.org/10.1103/PhysRevD.106.085010

This work is distributed under a Creative Commons Attribution 4.0 International License (CC BY 4.0).