Abstract
The plane, defined by the equation of state parameter for the dark energy and its derivative with respect to the logarithm of the scale factor, is useful to the study of classifying the dynamical dark energy models. In this note, we examine the evolving behavior of the two-field quintom models with crossing the barrier in the plane. We find that these models can be divided into two categories, type A quintom in which changes from to and type B quintom in which changes from to as the universe expands.
- Received 10 August 2006
DOI:https://doi.org/10.1103/PhysRevD.74.127304
©2006 American Physical Society