Reconstructing a String-Inspired Quintom Model of Dark Energy

Abstract

In this paper, we develop a simple method for the reconstruction of the string-inspired dark energy model with the lagrangian $\mathcal{L}=-V(\varphi )\sqrt{1-{\alpha }^{\prime }{\nabla }_{\mu }\varphi {\nabla }^{\mu }\varphi +{\beta }^{\prime }\varphi \square \varphi }$ given by Cai et. al., which may allow the equation-of-state parameter cross the cosmological constant boundary $(w=-1)$. We reconstruct this model in the light of three forms of parametrization for dynamical dark energy.

Comments: 8pages, 6figures