Cosmic acceleration and crossing of $ω=-1$ in non-minimal modified Gauss-Bonnet gravity

Details Cosmic acceleration and crossing of $ω=-1$ in non-minimal modified Gauss-Bonnet gravity Cosmic acceleration and crossing of $ω=-1$ in non-minimal modified Gauss-Bonnet gravity

2009-05-10

arxiv.org/abs/0905.1468v1

Phys.Lett.B679:302-305,2009

Physics

High Energy Physics

High Energy Physics - Theory

8 pages, no figures

Scientific paper

10.1016/j.physletb.2009.07.003

Modified Gauss-Bonnet, i.e, $f(G)$ gravity is a possible explanation of dark energy. Late time cosmology for the $f(G)$ gravity non-minimally coupled with a free massless scalar field have been investigated in Ref. [32]. In this paper we generalize the work of Ref. [32] by including scalar potential in the matter Lagrangian which is non-minimally coupled with modified Gauss-Bonnet gravity. Also we obtain the conditions for having a much more amazing problem than the acceleration of the universe, i.e: crossing of $\omega=-1$, in $f(G)$ non-minimally coupled with tachyonic Lagrangian.

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