Cosmological dynamics of fourth-order gravity with a Gauss-Bonnet term
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We consider the cosmological dynamics of fourth-order gravity with both f(R) and Φ(G) corrections to the Einstein gravity (G is the Gauss-Bonnet invariant). The particular case for which both terms are equally important on power-law solutions is described. These solutions and their stability are studied using the dynamic system approach. We also discuss the condition of existence and stability of a de Sitter solution in a more general situation of power-law f and Φ.
KeywordsStationary Point Power Index Einstein Gravity Additional Relation Sitter Solution
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- 17.S. Nojiri and S. Odintsov, arXiv: 1011.0544.Google Scholar