A Two-field Dilaton Model of Dark Energy

Details A Two-field Dilaton Model of Dark Energy A Two-field Dilaton Model of Dark Energy

2009-04-29

arxiv.org/abs/0904.4626v2

Chin.Phys.Lett.26:069501,2009

Astronomy and Astrophysics

Astrophysics

Cosmology and Extragalactic Astrophysics

6 pages, 1 figure, accepted for publication in Chin. Phys. Lett

Scientific paper

10.1088/0256-307X/26/6/069501

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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