Quintom cosmologies with arbitrary potentials

Details Quintom cosmologies with arbitrary potentials Quintom cosmologies with arbitrary potentials

2007-01-11

arxiv.org/abs/astro-ph/0701353v2

Phys.Lett.B649:103-110,2007

Astronomy and Astrophysics

Astrophysics

revtex4, 9 pages, 3 eps figures, Article in press at PLB

Scientific paper

10.1016/j.physletb.2007.03.060

In this paper we investigate quintom cosmologies with arbitrary potentials from the dynamical systems perspective. The dynamical systems analysis is complete in the sense that it includes the asymptotic regime where both scalar fields diverge, which proves to be particularly relevant in connection with the existence of tracking phases. The results of the present study indicate that the existence of phantom attractors is not generic: for quintom models there may exist either de Sitter attractors associated with the saddle points of the potential, or tracking attractors in the asymptotic regime where the scalar fields diverge.

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