Dark energy from scalar field with Gauss Bonnet and non-minimal kinetic coupling
High Energy Physics - Theory
2012-02-01 v1 General Relativity and Quantum Cosmology
Abstract
We study a model of scalar field with a general non-minimal kinetic coupling to itself and to the curvature, and additional coupling to the Gauss Bonnet 4-dimensional invariant. The model presents rich cosmological dynamics and some of its solutions are analyzed. A variety of scalar fields and potentials giving rise to power-law expansion have been found. The dynamical equation of state is studied for two cases, with and without free kinetic term . In both cases phenomenologically acceptable solutions have been found. Some solutions describe essentially dark energy behavior, and and some solutions contain the decelerated and accelerated phases.
Keywords
Cite
@article{arxiv.1108.6236,
title = {Dark energy from scalar field with Gauss Bonnet and non-minimal kinetic coupling},
author = {L. N. Granda},
journal= {arXiv preprint arXiv:1108.6236},
year = {2012}
}
Comments
21 pages