Twist Operator BOPE and Entanglement Entropy in 2D Interface CFT
High Energy Physics - Theory
2026-05-08 v2
Abstract
We address several aspects of entanglement entropy of 2D interface CFT using the replica method. Unlike the case of boundary CFT, we consider the boundary OPE (BOPE) of the R\'enyi twist operator and find a boundary twist operator anchored on the interface. This approach gives the contribution to the entanglement entropy in terms of the BOPE coefficients of the twist operator. We further analyze entanglement entropy of different intervals and compare our findings with previous holographic results.
Cite
@article{arxiv.2605.01150,
title = {Twist Operator BOPE and Entanglement Entropy in 2D Interface CFT},
author = {Mianqi Wang},
journal= {arXiv preprint arXiv:2605.01150},
year = {2026}
}