Holographic entanglement entropy and mutual information in deformed field theories at finite temperature

TL;DR

This paper investigates how temperature and $T{ar{T}}$ deformation influence holographic entanglement entropy and mutual information, revealing universal correction terms and their effects on subsystem correlations.

Contribution

It provides analytical calculations of entanglement measures in deformed, finite-temperature holographic theories, highlighting universal correction terms independent of non-local scale.

Findings

Temperature and deformation reduce mutual information.

Universal correction terms appear in entanglement entropy.

Deformation introduces a cutoff in the dual gravity background.

Abstract

In this paper we have studied the effect of deformation and temperature on holographic entanglement entropy and mutual information between two subsystems in a deformed field theory at finite temperature. The $T{\overline{T}}$ deformation operator in field theory introduces a cut-off in the dual gravity background. We define different regimes of parameters and calculate the entanglement entropy and mutual information analytically. We observe that temperature and deformation parameter have similar effects on entanglement entropy and mutual information. They both lead to decrease in mutual information or somehow the correlation between the two subsystems. Interestingly we observe the emergence of correction terms in entanglement entropy and mutual information that are universal and do not depend on the scale of the non-local operator.