Holographic Mutual Information of Two Disjoint Spheres

TL;DR

This paper investigates quantum corrections to holographic mutual information between two distant spheres, revealing universal behaviors across various field types and emphasizing the importance of gauge parts in propagators.

Contribution

It provides a universal analysis of quantum corrections to holographic mutual information for disjoint spheres using the operator product expansion and the 1/n prescription.

Findings

Quantum corrections vanish at semiclassical order for large separation.

Universal behavior of corrections for scalar, vector, tensor, and fermionic fields.

Gauge parts in propagators are crucial for fields with gauge symmetry.

Abstract

We study quantum corrections to holographic mutual information for two disjoint spheres at a large separation by using the operator product expansion of the twist field. In the large separation limit, the holographic mutual information is vanishing at the semiclassical order, but receive quantum corrections from the fluctuations. We show that the leading contributions from the quantum fluctuations take universal forms as suggested from the boundary CFT. We find the universal behavior for the scalar, the vector, the tensor and the fermionic fields by treating these fields as free fields propagating in the fixed background and by using the 1/n prescription. In particular, for the fields with gauge symmetries, including the massless vector boson and massless graviton, we find that the gauge parts in the propagators play indispensable role in reading the leading order corrections to the bulk mutual information.