Ricci Dark Energy in braneworld models with a Gauss-Bonnet term in the bulk

TL;DR

This paper explores Ricci Dark Energy within braneworld models incorporating a Gauss-Bonnet term, showing the universe tends toward a de Sitter phase rather than a big rip, and examines the effects of different IR cutoffs on cosmic acceleration.

Contribution

It provides an analytical solution to the generalized Friedmann equation in braneworld models with Gauss-Bonnet term, revealing a stable de Sitter universe and analyzing holographic dark energy effects.

Findings

Universe evolves into a de Sitter spacetime instead of a big rip.

Hubble horizon as IR cutoff does not lead to acceleration in this model.

Analytical solutions for the Friedmann equation in braneworld with Gauss-Bonnet term.

Abstract

We investigate the Ricci Dark Energy (RDE) in the braneworld models with a Gauss-Bonnet term in the Bulk. We solve the generalized Friedmann equation on the brane analytically and find that the universe will finally enter into a pure de Sitter spacetime in stead of the big rip that appears in the usual 4D Ricci dark energy model with parameter $\alpha<1/2$. We also consider the Hubble horizon as the IR cutoff in holographic dark energy model and find it can not accelerate the universe as in the usual case without interacting.