Astronomy and Astrophysics – Astrophysics
Scientific paper
2006-02-27
Phys.Lett. B638 (2006) 303-309
Astronomy and Astrophysics
Astrophysics
revtex4, 7 pages, 6 figures
Scientific paper
10.1016/j.physletb.2006.05.075
In this paper we investigate the evolution of a class of cosmologies fuelled by quintom dark energy and dark matter. Quintom dark energy is a hybrid of quintessence and phantom which involves the participation of two reals scalar fields playing the roles of those two types of dark energy. In that framework we examine from a dynamical systems perspective the possibility that those fields are coupled among them by considering an exponential potential with an interesting functional dependence similar but not identical to others studied before. The model we consider represents a counterexample to the typical behavior of quintom models with exponential potentials because it admits either tracking attractors ($w=0$), or phantom attractors ($w<-1$).
Lazkoz Ruth
Leon Genly
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