Crossing of $\omega=-1$ with Tachyon and Non-minimal Derivative Coupling
General Relativity and Quantum Cosmology
2011-09-07 v2
Abstract
We construct a single scalar field model with tachyon field non-minimally coupled to itself, its derivative and to the curvature. We study the cosmological dynamics of the equation of state in this setup. While it is expected that in the case of single scalar field the crossing of the phantom divide line can not be realized [10], we show that incorporating quantum corrections, namely, non-minimal derivative coupling of scalar field with curvature in our model, lead to phantom divide crossing.
Keywords
Cite
@article{arxiv.1105.4967,
title = {Crossing of $\omega=-1$ with Tachyon and Non-minimal Derivative Coupling},
author = {A. Banijamali and B. Fazlpour},
journal= {arXiv preprint arXiv:1105.4967},
year = {2011}
}
Comments
11 pages, 2 figures. Some explanations and references added. Accepted for publication in Phys. Lett. B