Late time cosmological scenarios from scalar field with Gauss Bonnet and non-minimal kinetic couplings

Details Late time cosmological scenarios from scalar field with Gauss Bonnet and non-minimal kinetic couplings Late time cosmological scenarios from scalar field with Gauss Bonnet and non-minimal kinetic couplings

2011-09-07

arxiv.org/abs/1109.1371v1

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

25 pages

Scientific paper

We study a model of scalar field with kinetic terms non-minimally coupled to to the curvature, and the scalar field coupled to the Gauss Bonnet 4-dimensional invariant. A variety of solutions are found, giving rise to different cosmological scenarios. A unified description of early time matter (radiation) dominance with transitions to late time quintessence and phantom phases have been made. Among others, we found solutions unifying asymptotically the early power law behavior and late time cosmological constant. Solutions of Chaplygin gas and generalized Chaplygin gas cosmologies have also been found.

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