Holographic entanglement negativity for disjoint intervals in $AdS_3/CFT_2$

TL;DR

This paper develops a holographic method to compute entanglement negativity for disjoint intervals in 2D conformal field theories using the $AdS_3/CFT_2$ correspondence, matching known results in the large central charge limit.

Contribution

It introduces a new holographic construction for entanglement negativity of disjoint intervals in $CFT_{1+1}$, involving algebraic sums of geodesics in the bulk $AdS_3$ space.

Findings

Reproduces universal features of negativity in large central charge limit

Applies to $AdS_3$ geometries and BTZ black holes

Matches results from replica technique

Abstract

We advance a holographic construction for the entanglement negativity of bipartite mixed state configurations of two disjoint intervals in $(1+1)$ dimensional conformal field theories ($CFT_{1+1}$) through the $AdS_3/CFT_2$ correspondence. Our construction constitutes the large central charge analysis of the entanglement negativity for mixed states under consideration and involves a specific algebraic sum of bulk space like geodesics anchored on appropriate intervals in the dual $CFT_{1+1}$. The construction is utilized to compute the holographic entanglement negativity for such mixed states in $CFT_{1+1}$s dual to bulk pure $AdS_3$ geometries and BTZ black holes respectively. Our analysis exactly reproduces the universal features of corresponding replica technique results in the large central charge limit which serves as a consistency check.