Constructing dark energy models with late time de Sitter attractor

Abstract

In this paper, we describe a way to construct a class of dark energy models that admit late time de Sitter attractor solution. In the canonical scalar and Born-Infeld scalar dark energy models, we show mathematically that a simple sufficient condition for the existence of a late time de Sitter like attractor solution is that the potentials of the scalar field have non-vanishing minimum while this condition becomes that the potentials have non-vanishing maximum for the phantom models. These attractor solutions correspond to an equation of state $w=-1$ and a cosmic density parameter ${\Omega }_{\varphi }=1$, which are important features for a dark energy model that can meet the current observations.

8 pages, 9 eps figures, this condensed version will be published in Phys. Rev. D

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