General Non-minimal Kinetic coupling to gravity

Details General Non-minimal Kinetic coupling to gravity General Non-minimal Kinetic coupling to gravity

2010-05-16

arxiv.org/abs/1005.2716v2

Physics

High Energy Physics

High Energy Physics - Theory

25 pages, 3 figures; figure added, references added

Scientific paper

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.

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