Holographic dark energy in braneworld models with a Gauss–Bonnet term in the bulk. Interacting behavior and the w=−1 crossing

By Emmanuel N. Saridakis. 2007

142 citations recorded by the source corpus.

Abstract We apply bulk holographic dark energy in general braneworld models with a Gauss–Bonnet term in the bulk and an induced gravity term and a perfect fluid on the brane. Without making any additional assumptions we extract the Friedmann equation on the physical brane and we show that a ρ – ρ Λ coupling arises naturally by the full 5D dynamics. The low-energy (late-time) evolution reveals that the effective 4D holographic dark energy behaves as “quintom”, that is it crosses the phantom divide w = − 1 during the evolution. In particular, the Gauss–Bonnet contribution decreases the present value of w Λ , while it increases the growing rate of w Λ ( z ) with z, in comparison with the case where such a term is absent.

Subfields: Astronomy and Astrophysics, Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/7b87e479649c0771cdd4786248b59888086ed100