On holographic braneworld cosmology

TL;DR

This paper extends holographic braneworld cosmology models to general black hole spacetimes with pure tension branes, demonstrating the feasibility of gravity localization on the brane in these settings.

Contribution

It introduces a generalized holographic framework for braneworld cosmology using mixed boundary conditions, beyond specific black hole backgrounds.

Findings

Holographic description is possible for general black hole spacetimes with tension branes.

Euclidean solutions are consistent with gravity localization on the brane.

The model applies to AdS-Schwarzschild black holes as a specific example.

Abstract

Recently, S. Antonini and B. Swingle builded a holographic model for braneworld cosmology by introducing an ``end-of-the-world" (ETW) brane moving in a charged black hole spactime. In this paper, we will show that a holographic description of braneworld cosmology is possible for a general black hole spacetime with a pure tension brane if one implements a mixed boundary condition on the ETW brane. As a simple example, we study AdS-Schwarzschild black holes and show that a sensible Euclidean braneworld solution is compatible with localization of gravity on the ETW brane.