Universal relations for holographic interfaces

TL;DR

This paper investigates entanglement entropy in 1+1D conformal field theories with interfaces using holography, revealing new patterns and universal relations influenced by interface placement.

Contribution

It introduces novel universal relations for entanglement entropy in holographic interfaces, extending understanding beyond boundary conformal field theories.

Findings

Entanglement entropy varies with interface position.

New universal relations identified for holographic interfaces.

Patterns differ from boundary conformal field theories.

Abstract

We study the entanglement entropy in 1+1 dimensional conformal field theories in the presence of interfaces from a holographic perspective. Compared with the well-known case of boundary conformal field theories, interfaces allow for several interesting new observables. Depending on how the interface is located within the entangling region, the entanglement entropies differ and exhibit surprising new patterns and universal relations. While our analysis is performed within the framework of holography, we expect our results to hold more generally.