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29 March 2024
 
  » arxiv » astro-ph/0410654

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Cosmological Evolution of a Quintom Model of Dark Energy
Zong-Kuan Guo ; Yun-Song Piao ; Xinmin Zhang ; Yuan-Zhong Zhang ;
Date 27 Oct 2004
Journal Phys.Lett. B608 (2005) 177-182 DOI: 10.1016/j.physletb.2005.01.017
Subject astro-ph
AbstractWe investigate in this paper the cosmological evolution of a dark energy model with two scalar fields where one of the scalar has canonical kinetic energy and another scalar has negative kinetic energy term. For such a system with exponential potentials 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. A phase-plane analysis shows that the "phantom"-dominated scaling solution is the stable late-time attractor of this type of models.
Source arXiv, astro-ph/0410654
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