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A Two-field Dilaton Model of Dark Energy

Authors
  • Liang, Nan
  • Gao, ChangJun
  • Zhang, ShuangNan
Type
Published Article
Publication Date
Nov 02, 2009
Submission Date
Apr 29, 2009
Identifiers
DOI: 10.1088/0256-307X/26/6/069501
Source
arXiv
License
Yellow
External links

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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