Remarks on generalized Gauss-Bonnet dark energy
General Relativity and Quantum Cosmology
2009-12-04 v2 Astrophysics
High Energy Physics - Theory
Abstract
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.
Keywords
Cite
@article{arxiv.0811.1286,
title = {Remarks on generalized Gauss-Bonnet dark energy},
author = {M. Alimohammadi and A. Ghalee},
journal= {arXiv preprint arXiv:0811.1286},
year = {2009}
}
Comments
11 pages, LaTeX, a paragraph added, to be appeared in Phys. Rev. D