General Non-minimal Kinetic coupling to gravity
High Energy Physics - Theory
2015-03-17 v2
Abstract
We study a new model of scalar field with a general non-minimal kinetic coupling to itself and to the curvature, as a source of dark energy, and analyze the cosmological dynamics of this model and the issue of accelerated expansion. A wide variety of scalar fields and potentials giving rise to power-law expansion have been found. The dynamical equation of state is studied for the two cases, without and with free kinetic term . In the first case, a behavior very close to that of the cosmological constant was found. In the second case, a solution was found, which match the current phenomenology of the dark energy. The model shows a rich variety of dynamical scenarios.
Cite
@article{arxiv.1005.2716,
title = {General Non-minimal Kinetic coupling to gravity},
author = {L. N. Granda and W. Cardona},
journal= {arXiv preprint arXiv:1005.2716},
year = {2015}
}
Comments
25 pages, 3 figures; figure added, references added