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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 | Abstract: | We 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 | Services: | Forum | Review | PDF | Favorites |
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