Modified Gauss-Bonnet theory as gravitational alternative for dark energy

Details Modified Gauss-Bonnet theory as gravitational alternative for dark energy Modified Gauss-Bonnet theory as gravitational alternative for dark energy

2005-08-08

arxiv.org/abs/hep-th/0508049v2

Phys.Lett.B631:1-6,2005

Physics

High Energy Physics

High Energy Physics - Theory

LaTeX file, 5 pages, version to appear in PLB

Scientific paper

10.1016/j.physletb.2005.10.010

We suggest the modified gravity where some arbitrary function of Gauss-Bonnet (GB) term is added to Einstein action as gravitational dark energy. It is shown that such theory may pass solar system tests. It is demonstrated that modified GB gravity may describe the most interesting features of late-time cosmology: the transition from deceleration to acceleration, crossing the phantom divide, current acceleration with effective (cosmological constant, quintessence or phantom) equation of state of the universe.

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