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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.
2005
发表期刊MODERN PHYSICS LETTERS A
ISSN0217-7323
卷号20期号:15页码:1147-1154
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.
部门归属Bohai Univ, Dept Phys, Liaoning 121000, Peoples R China; Chinese Acad Sci, Inst Theoret Phys, Beijing 100080, Peoples R China
关键词Equation-of-state Hubble-space-telescope Cosmology Quantum Supernovae Singularities Constraints Component Matter
学科领域Physics
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收录类别SCI
WOS记录号WOS:000229569400004
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被引频次:14[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.itp.ac.cn/handle/311006/13818
专题理论物理所1978-2010年知识产出
通讯作者Wei, YH , Bohai Univ, Dept Phys, Liaoning 121000, Peoples R China.
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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.
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