Cosmological dynamics in six-order gravity

Details Cosmological dynamics in six-order gravity Cosmological dynamics in six-order gravity

2010-07-20

arxiv.org/abs/1007.3365v1

Grav.Cosmol.17:110-118,2011

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

Scientific paper

10.1134/S0202289311020198

We consider cosmological dynamics in generalized modified gravity theory with the $R\Box R$ term added to the action of the form $R+R^N$. Influence of $R \Box R$ term to the known solutions of modified gravity is described. We show that in particular case of $N=3$ these two non-Einstein terms are equally important on power-law solutions. These solutions and their stability have been studied using dynamical system approach. Some results for the case of $N \ne 3$ (including stability of de Sitter solution in the theory under investigation) have been found using other methods.

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