On The Varying Speed of Light in a Brane-Induced FRW Universe

TL;DR

This paper explores a string/M-theoretic model where the speed of light varies in a brane universe influenced by a black hole background, proposing a stabilization mechanism for the speed of light over time.

Contribution

It introduces a generalized dynamical model including rotation and Hubble damping, providing a potential mechanism to stabilize the speed of light in a brane-world scenario.

Findings

Inclusion of rotation and Hubble damping affects brane dynamics.

A stabilization mechanism for the speed of light is proposed.

The model suggests late-time fixing of the speed of light.

Abstract

We investigate a string/M theoretic realization of the varying speed of light scenario. We consider a 3+1 dimensional probe-brane universe in the background of a black hole in the bulk formed by a stack of branes, in the spirit of Kiritsis (hep-th/9906206). We generalize the dynamics of the system at hand by including rotation and Hubble damping of the bulk space-time and show that this may lead to a mechanism to stabilize the brane-universe and hence fix the speed of light at late times.