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A note on crossing the phantom divide in hybrid dark energy model
Wei, H; Cai, RG; Wei, H , Chinese Acad Sci, Inst Theoret Phys, POB 2735, Beijing 100080, Peoples R China
2006
发表期刊PHYSICS LETTERS B
ISSN0370-2693
卷号634期号:1页码:9-13
摘要Recently a lot of attention has been given to building dark energy models in which the equation-of-state parameter w can cross the phantom divide w = -1. However, to our knowledge, these models with crossing the phantom divide only provide the possibility that w can cross -1. They do not answer another question: why crossing phantom divide occurs recently? Since in many existing models whose equation-of-state parameter can cross the phantom divide, w undulates around -1 randomly, why are we living in an epoch w < -1? This can be regarded as the second cosmological coincidence problem. In this Letter, we propose a possible approach to alleviate this problem within a hybrid dark energy model. (c) 2006 Published by Elsevier B.V.
部门归属Chinese Acad Sci, Inst Theoret Phys, Beijing 100080, Peoples R China; Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China
关键词High-redshift Supernovae Hubble-space-telescope Equation-of-state Cosmological Constant Constraints Transition Component Evolution Universe Lambda
学科领域Physics
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收录类别SCI
WOS记录号WOS:000235627500003
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被引频次:66[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/311006/6024
专题理论物理所1978-2010年知识产出
通讯作者Wei, H , Chinese Acad Sci, Inst Theoret Phys, POB 2735, Beijing 100080, Peoples R China
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Wei, H,Cai, RG,Wei, H , Chinese Acad Sci, Inst Theoret Phys, POB 2735, Beijing 100080, Peoples R China. A note on crossing the phantom divide in hybrid dark energy model[J]. PHYSICS LETTERS B,2006,634(1):9-13.
APA Wei, H,Cai, RG,&Wei, H , Chinese Acad Sci, Inst Theoret Phys, POB 2735, Beijing 100080, Peoples R China.(2006).A note on crossing the phantom divide in hybrid dark energy model.PHYSICS LETTERS B,634(1),9-13.
MLA Wei, H,et al."A note on crossing the phantom divide in hybrid dark energy model".PHYSICS LETTERS B 634.1(2006):9-13.
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