Late-time phantom universe in SO(1,1) dark energy model with exponential potential

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	Late-time phantom universe in SO(1,1) dark energy model with exponential potential
	Wei, YH; Wei, YH , Bohai Univ, Dept Phys, Liaoning 121000, Peoples R China.
刊名	MODERN PHYSICS LETTERS A
	2005
卷号	20 期号:15 页码:1147-1154
关键词	Equation-of-state Hubble-space-telescope Cosmology Quantum Supernovae Singularities Constraints Component Matter
ISSN号	0217-7323
英文摘要	We discuss the late-time property of universe and phantom field in the SO(1, 1) dark energy model for the potential V = V(0)e-β&UPhi;(α) with α and β two positive constants. We assume in advance some conditions satisfied by the late-time field to simplify equations, which are confirmed to be correct from the eventual results. For α < 2, the field falls exponentially off and the phantom equation of state rapidly approaches -1. When α = 2, the kinetic energy p(k) and the coupling energy p(c) become comparable but there is always p(k) < -p(c) so that the phantom property of field proceeds to hold. The analysis on the perturbation to the late-time field &UPhi; illustrates the square effective mass of the perturbation field is always positive and thus the phantom is stable. The universe considered currently may evade the future sudden singularity and will evolve to de Sitter expansion phase.
学科主题	Physics
URL标识	查看原文
WOS记录号	WOS:000229569400004
公开日期	2012-08-30
内容类型	期刊论文
源URL	[http://ir.itp.ac.cn/handle/311006/13818]
专题	理论物理研究所_理论物理所1978-2010年知识产出
通讯作者	Wei, YH , Bohai Univ, Dept Phys, Liaoning 121000, Peoples R China.
推荐引用方式 GB/T 7714	Wei, YH,Wei, YH , Bohai Univ, Dept Phys, Liaoning 121000, Peoples R China.. Late-time phantom universe in SO(1,1) dark energy model with exponential potential[J]. MODERN PHYSICS LETTERS A,2005,20(15):1147-1154.
APA	Wei, YH,&Wei, YH , Bohai Univ, Dept Phys, Liaoning 121000, Peoples R China..(2005).Late-time phantom universe in SO(1,1) dark energy model with exponential potential.MODERN PHYSICS LETTERS A,20(15),1147-1154.
MLA	Wei, YH,et al."Late-time phantom universe in SO(1,1) dark energy model with exponential potential".MODERN PHYSICS LETTERS A 20.15(2005):1147-1154.