Universal Behavior of Entanglement Entropies in Interface CFTs from General Holographic Spacetimes

TL;DR

This paper demonstrates that the universal behavior of logarithmic terms in entanglement entropy, previously observed in specific models, is actually a general feature of all holographic interface conformal field theories, reinforcing the conjecture's validity.

Contribution

It proves that the universal entanglement entropy behavior holds across all holographic ICFTs, extending prior observations to a broader class of theories.

Findings

Universal logarithmic behavior confirmed in all holographic ICFTs

Strengthens the conjecture of universal entanglement entropy terms

Supports the holographic duality framework for ICFTs

Abstract

In previous work universal behavior was conjectured for the behavior of the logarithmic terms in the entanglement entropy of intervals in 1+1 dimensional interface conformal field theories (ICFTs). These putative universal terms were exhibited both in free field theories as well as a large class of holographic models. In this work we demonstrate that this same behavior in fact is realized in any holographic ICFT, significantly strengthening the case for the conjecture.