Big Rip and Little Rip solutions in scalar model with kinetic and Gauss Bonnet couplings

Details Big Rip and Little Rip solutions in scalar model with kinetic and Gauss Bonnet couplings Big Rip and Little Rip solutions in scalar model with kinetic and Gauss Bonnet couplings

2011-11-10

arxiv.org/abs/1111.2454v1

IJMPD, Vol. 21, No. 1 (2012) 1250002

Physics

High Energy Physics

High Energy Physics - Theory

17 pages, 2 figures, to appear in IJMPD

Scientific paper

10.1142/S0218271812500022

Late time cosmological solutions for scalar field model with kinetic and Gauss Bonnet couplings are considered. The quintom scenario is realized with and without Big Rip singularity. We find that under specific choice of the Gauss Bonnet coupling, the model considerable simplifies, giving rise to solutions where the kinetic term is proportional to the square of the Hubble parameter. This allows to reconstruct the model for a suitable cosmological evolution. We considered a solution that matches the observed behavior of the equation of state, while Big Rip singularity may be present or absent, depending on the parameters of the solution. Evolutionary scenarios known as Little Rip, have also been considered.

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