Semi-realistic Bouncing Domain Wall Cosmology

TL;DR

This paper develops a semi-realistic cosmological model with a dynamic domain wall in higher dimensions, revealing an induced dark matter component and a non-singular bounce in early universe evolution.

Contribution

It introduces a novel higher-dimensional domain wall cosmology incorporating Born-Infeld fields and demonstrates a smooth bounce with additional gauge fields.

Findings

Effective Hubble equation includes induced dark matter from bulk charge.

Non-singular bounce occurs with additional pure gauge fields.

Smooth transition between contraction and expansion phases achieved.

Abstract

In this paper we constructed a semi-realistic cosmological model in a dynamic domain wall framework. Our universe is considered to be a (3+1) dimensional dynamic domain wall in a higher dimensional Einstein-Maxwell-Born-Infeld background. One of our interesting outcomes from the effective Hubble equation for the domain wall dynamics is that it contains an additional component of "dark matter" which is induced from the charge of the bulk Born-Infeld gauge field. In this background spacetime we have studied the cosmological dynamics of the domain wall. In addition to the Born-Infield gauge field if we consider additional pure gauge field, a non-singular bounce happens at the early stage with a smooth transition between contracting and expanding phase.