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Hessence: a new view of quintom dark energy
Wei, H; Cai, RG; Zeng, DF; Wei, H , Chinese Acad Sci, Inst Theoret Phys, POB 2735, Beijing 100080, Peoples R China.
2005
发表期刊CLASSICAL AND QUANTUM GRAVITY
ISSN0264-9381
卷号22期号:16页码:3189-3202
摘要Recently a lot of attention has been given to building a dark energy model in which the equation-of-state parameter w can cross the phantom divide w = -1. One of the models to realize crossing the phantom divide is called the quintom model, in which two real scalar fields appear, one is a normal scalar field and the other is a phantom-type scalar field. In this paper we propose a non-canonical complex scalar field as the dark energy, which we dub 'hessence', to implement crossing the phantom divide, in a similar sense as the quintom dark energy model. In the hessence model, the dark energy is described by a single field with an internal degree of freedom rather than two independent real scalar fields. However, the hessence is different from an ordinary complex scalar field, we show that the hessence can avoid the difficulty of the Q-ball formation which gives trouble to the spintessence model (an ordinary complex scalar field acts as the dark energy). Furthermore, we find that, by choosing a proper potential, the hessence could correspond to a Chaplygin gas at late,times.
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; Baylor Univ, Dept Phys, CASPER, Waco, TX 76798 USA
关键词High-redshift Supernovae Probe Wmap Observations Hubble-space-telescope Cosmological Constant Scalar Field Q-balls Quintessence Constraints Matter Acceleration
学科领域Physics
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收录类别SCI
WOS记录号WOS:000231919000009
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文献类型期刊论文
条目标识符http://ir.itp.ac.cn/handle/311006/13760
专题理论物理所SCI论文
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,Zeng, DF,et al. Hessence: a new view of quintom dark energy[J]. CLASSICAL AND QUANTUM GRAVITY,2005,22(16):3189-3202.
APA Wei, H,Cai, RG,Zeng, DF,&Wei, H , Chinese Acad Sci, Inst Theoret Phys, POB 2735, Beijing 100080, Peoples R China..(2005).Hessence: a new view of quintom dark energy.CLASSICAL AND QUANTUM GRAVITY,22(16),3189-3202.
MLA Wei, H,et al."Hessence: a new view of quintom dark energy".CLASSICAL AND QUANTUM GRAVITY 22.16(2005):3189-3202.
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