A string-inspired quintom model of dark energy
A string-inspired quintom model of dark energy
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DOI:
10.1016/j.physletb.2007.05.056
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发表时间:
2007-01
影响因子:
4.4
通讯作者:
Shuai Zhang;Bin Chen
中科院分区:
文献类型:
--
作者:
Shuai Zhang;Bin Chen
We propose in this Letter a quintom model of dark energy with a single scalar field ϕ given by the Lagrangian [Formula: see text] . In the limit of β′→0 our model reduces to the effective low energy Lagrangian of tachyon considered in the literature. We study the cosmological evolution of this model, and show explicitly the behaviors of the equation of state crossing the cosmological constant boundary.