On the dynamics of unified k-essence cosmologies
Abstract
We analyze the phase space of a particular unified model of dark matter, dark energy, and inflation that we recently studied in [Phys. Rev. D 83, 063502 (2011)] whose Lagrangian is of the form L(X,phi) = F(X) - V(phi). We show that this model possesses a large set of initial conditions consistent with a successful cosmological model in which an inflationary phase is possible, followed by a matter era to end with dark energy domination. In order to understand the success of the model, we study the general features that unified dark matter (UDM) models should comply and then we analyze some particular models and find their constrictions.
Keywords
Cite
@article{arxiv.1206.2036,
title = {On the dynamics of unified k-essence cosmologies},
author = {Josue De-Santiago and Jorge L. Cervantes-Cota},
journal= {arXiv preprint arXiv:1206.2036},
year = {2012}
}
Comments
9 pages, 1 figure, v2 clarified discussions and formulae to match the accepted version to appear in the proceedings of "IX Taller DGFM-SMF"