Defect entanglement entropy for superconformal monodromy defects

TL;DR

This paper calculates the entanglement entropy associated with superconformal monodromy defects in holographic theories, revealing that its universal part may not decrease under renormalization group flow, contrasting bulk defect behavior.

Contribution

It explicitly relates defect entanglement entropy to defect CFT data and explores its behavior under RG flow in holographic models.

Findings

Universal defect entanglement entropy is related to defect CFT data.

The universal part of defect entanglement entropy may increase along RG flow.

Contrasts with bulk defect theories where entropy decreases under RG flow.

Abstract

We compute the defect entanglement entropy for co-dimension two superconformal monodromy defects in well known maximally symmetric holographic theories of various dimension. In each case we explicitly relate the universal part of the defect entanglement entropy to field theory data characterising the defect conformal field theory. We provide evidence that, unlike in the bulk theories in which the defects reside, the universal part of the defect entanglement entropy does not necessarily decrease along a renormalisation group flow.