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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
Source PublicationMODERN PHYSICS LETTERS A
KeywordEquation-of-state Hubble-space-telescope Cosmology Quantum Supernovae Singularities Constraints Component Matter
AbstractWe 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.
2005
ISSN0217-7323
Volume20Issue:15Pages:1147-1154
Subject AreaPhysics
Indexed BySCI
Citation statistics
Cited Times:15[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.itp.ac.cn/handle/311006/13818
Collection理论物理所科研产出_SCI论文
Corresponding AuthorWei, YH , Bohai Univ, Dept Phys, Liaoning 121000, Peoples R China.
Recommended Citation
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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