Remarks on generalized Gauss-Bonnet dark energy

Details Remarks on generalized Gauss-Bonnet dark energy Remarks on generalized Gauss-Bonnet dark energy

2008-11-08

arxiv.org/abs/0811.1286v2

Phys.Rev.D79:063006,2009

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

11 pages, LaTeX, a paragraph added, to be appeared in Phys. Rev. D

Scientific paper

10.1103/PhysRevD.79.063006

The modified gravity with F(R,G) Lagrangian, G is the Gauss-Bonnet invariant, is considered. It is shown that the phantom-divide-line crossing and the deceleration to acceleration transition generally occur in these models. Our results coincide with the known results of f(R)-gravity and f(G)-gravity models. The contribution of quantum effects to these transitions is calculated, and it is shown that in some special cases where there are no transitions in classical level, quantum contributions can induce transitions. The quantum effects are described via the account of conformal anomaly.

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