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arXiv · 0904.4626

A Two-field Dilaton Model of Dark Energy

Nan Liang·ChangJun Gao·ShuangNan Zhang
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Abstract

We investigate the cosmological evolution of a two-field model of dark energy where one is a dilaton field with canonical kinetic energy and the other is a phantom field with a negative kinetic energy term. A phase-plane analysis shows that the phantom-dominated scaling solution is the stable late-time attractor of this type of models. We find that during the evolution of the universe, the equation of state $w$ changes from $w > -1$ to $w <-1$, which is consistent with the recent observations.

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Nan Liang, ChangJun Gao, ShuangNan Zhang. 2009-11-02. A Two-field Dilaton Model of Dark Energy. https://doi.org/10.1088/0256-307x%2F26%2F6%2F069501

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