Cosmological Evolution of a Quintom Model of Dark Energy

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dc.creatorGuo, Zong-Kuan
dc.creatorPiao, Yun-Song
dc.creatorZhang, Xinmin
dc.creatorZhang, Yuan-Zhong
dc.date2004-10-27
dc.date.accessioned2026-07-07T02:15:31Z
dc.date.available2026-07-07T02:15:31Z
dc.descriptionWe 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.
dc.description9 pages, 3 figures, LaTeX2e
dc.identifierhttps://arxiv.org/abs/astro-ph/0410654
dc.identifierhttp://arxiv.org/abs/astro-ph/0410654
dc.identifierPhys.Lett. B608 (2005) 177-182
dc.identifierdoi:10.1016/j.physletb.2005.01.017
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/8436
dc.subjectAstrophysics
dc.titleCosmological Evolution of a Quintom Model of Dark Energy
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