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Entanglement Entropy in Closed String Theory

by Usman Naseer

Submission summary

As Contributors: Usman Naseer
Arxiv Link: https://arxiv.org/abs/2002.12148v1
Date submitted: 2020-03-13
Submitted by: Naseer, Usman
Submitted to: SciPost Physics
Discipline: Physics
Subject area: High-Energy Physics - Theory
Approach: Theoretical

Abstract

In local quantum field theory on a background spacetime, the entanglement entropy of a region is divergent due to the arbitrary short-wavelength correlations near the boundary of the region. Quantum gravitational fluctuations are expected to cut off the entropy of the ultraviolet modes. We study the entanglement entropy in closed string theory using the framework of string field theory. In particular, we compute the one-loop Renyi partition functions by considering the theory on a simple branched cover of the configuration space of closed strings. The short-wavelength modes are cut off at the string scale and the one-loop entanglement entropy is ultraviolet-finite. A non-canonical kinetic term, required to produce the correct one-loop vacuum amplitude, plays a key role.

Current status:
Editor-in-charge assigned


Submission & Refereeing History

Submission 2002.12148v1 on 13 March 2020

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