Quantum Corrections to Holographic Mutual Information

TL;DR

This paper calculates the leading quantum correction to the mutual information between two spheres in conformal field theories, providing a non-trivial check of the holographic FLM proposal by refining operator product expansion techniques.

Contribution

It introduces a refined method to compute quantum corrections to holographic mutual information for arbitrary CFTs, validating the FLM proposal in the large distance regime.

Findings

Quantum correction to MI matches FLM predictions

Method applicable to any dimension and CFT type

Provides a non-trivial consistency check of holographic duality

Abstract

We compute the leading contribution to the mutual information (MI) of two disjoint spheres in the large distance regime for arbitrary conformal field theories (CFT) in any dimension. This is achieved by refining the operator product expansion method introduced by Cardy \cite{Cardy:2013nua}. For CFTs with holographic duals the leading contribution to the MI at long distances comes from bulk quantum corrections to the Ryu-Takayanagi area formula. According to the FLM proposal\cite{Faulkner:2013ana} this equals the bulk MI between the two disjoint regions spanned by the boundary spheres and their corresponding minimal area surfaces. We compute this quantum correction and provide in this way a non-trivial check of the FLM proposal.