Late-time acceleration in a brane with curvature effects

TL;DR

This paper examines how adding a Gauss-Bonnet term to a brane-world model affects late-time cosmic acceleration, finding it diminishes the phantom-like behavior rather than enhancing it.

Contribution

It demonstrates that the inclusion of a Gauss-Bonnet term does not extend but rather reduces the phantom-like regime in the LDGP brane-world model.

Findings

Gauss-Bonnet term weakens phantom-like behavior

Breakdown of phantom regime occurs at smaller redshift

Gauss-Bonnet effect does not enhance late-time acceleration

Abstract

In this paper we investigate if the phantom-like regime in the LDGP model can be enlarged by the inclusion of a Gauss-Bonnet (GB) term into the bulk. However, we show that the opposite occurs: the GB effect seems instead to induce a breakdown of the phantom-like behaviour at an even smaller redshift.