Quintom cosmologies admitting either tracking or phantom attractors

Lazkoz, Ruth; Leon, Genly


In this Letter we investigate the evolution of a class of cosmologies fueled by quintom dark energy and dark matter. Quintom dark energy is a hybrid of quintessence and phantom which involves the participation of two real 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). (c) 2006 Elsevier B.V. All rights reserved.

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Título según WOS: ID WOS:000238774100001 Not found in local WOS DB
Título de la Revista: PHYSICS LETTERS B
Volumen: 638
Número: 4
Editorial: Elsevier
Fecha de publicación: 2006
Página de inicio: 303
Página final: 309


Notas: ISI