Holography for BCFTs with Multiple Boundaries: Multi-Splitting Quenches

TL;DR

This paper extends holographic dual methods to BCFTs with multiple boundaries, calculating time-dependent entanglement entropy for various subsystem splits, revealing consistent qualitative features across different boundary counts.

Contribution

It develops a method for holographic duals of BCFTs with multiple boundaries and provides explicit entanglement entropy calculations for specific boundary configurations.

Findings

Qualitative features persist for N=4 boundaries

Explicit entanglement entropy results for N=4 and N=17

Method generalizes to multiple boundary BCFTs

Abstract

We elaborate on the method introduced in arXiv:2403.02165 for holographic duals of Boundary Conformal Field Theories (BCFTs) with multiple boundaries. Using these advances we calculate the entanglement entropy as a function of time for 1+1-dimensional CFTs that are split into $N$ subsystems. We give explicit results for $N = 4$ and $N = 17$. We find that all qualitative differences that arise for larger $N$ are present for $N = 4$.