Bouncing Cosmology in Three Dimensions

TL;DR

This paper explores a bouncing cosmology scenario in a three-dimensional universe modeled by a brane in a four-dimensional black hole background, demonstrating a non-singular transition from contraction to expansion.

Contribution

It introduces a novel model of bouncing cosmology using brane dynamics in a black hole background with scalar hair, showing a non-singular universe transition.

Findings

Non-singular bounce achieved at low temperatures

Universe transitions from contraction to expansion smoothly

Black hole phase transition influences brane cosmology

Abstract

We consider a dynamical two-brane in a four dimensional black hole background with scalar hair. At high temperature this black hole goes through a phase transition by radiating away the scalar. The end phase is a topological adS-Schwarzschild black hole. We argue here that for a sufficiently low temperature, the brane motion in this geometry is non-singular. This results in a universe which passes over from a contracting phase to an expanding one without reaching a singularity.