# On New Proposal for Holographic BCFT

## TL;DR

This paper proposes a new holographic BCFT model, successfully reproducing boundary anomalies, entanglement entropy behaviors, and phase transitions, thus providing a consistent framework for boundary conformal field theories in holography.

## Contribution

It introduces a novel holographic BCFT proposal using PBH transformations, reproduces boundary anomalies, and analyzes entanglement entropy and phase transitions, advancing the understanding of holographic BCFTs.

## Key findings

- Successfully reproduces boundary Weyl anomaly.
- Entanglement entropy depends on boundary conditions and distance.
- Identifies phase transition behavior in entanglement wedge.

## Abstract

This paper is an extended version of our short letter on a new proposal for holographic boundary conformal field, i.e., BCFT. By using the Penrose-Brown-Henneaux (PBH) transformation, we successfully obtain the expected boundary Weyl anomaly. The obtained boundary central charges satisfy naturally a c-like theorem holographically. We then develop an approach of holographic renormalization for BCFT, and reproduce the correct boundary Weyl anomaly. This provides a non-trivial check of our proposal. We also investigate the holographic entanglement entropy of BCFT and find that our proposal gives the expected orthogonal condition that the minimal surface must be normal to the spacetime boundaries if they intersect. This is another support for our proposal. We also find that the entanglement entropy depends on the boundary conditions of BCFT and the distance to the boundary; and that the entanglement wedge behaves a phase transition, which is important for the self-consistency of AdS/BCFT. Finally, we show that the proposal of arXiv:1105.5165 is too restrictive that it always make vanishing some of the boundary central charges.