A Single Scalar Field Model of Dark Energy with Equation of State Crossing -1

Abstract

In this paper we study the possibility of building models of dark energy with equation of state across -1 and propose explicitly a model with a single scalar field which gives rise to an equation of state larger than -1 in the past and less than -1 at the present time, consistent with the current observations.

Comments: 4 pages, 1 figure, the version accepted by JCAP, presentation improved and references added