Hessence: a new view of quintom dark energy

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	Hessence: a new view of quintom dark energy
	Zeng, DF; Wei, H; Cai, RG; Wei, H , Chinese Acad Sci, Inst Theoret Phys, POB 2735, Beijing 100080, Peoples R China.
刊名	CLASSICAL AND QUANTUM GRAVITY
	2005
卷号	22 期号:16 页码:3189-3202
关键词	High-redshift Supernovae Probe Wmap Observations Hubble-space-telescope Cosmological Constant Scalar Field Q-balls Quintessence Constraints Matter Acceleration
ISSN号	0264-9381
英文摘要	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.
学科主题	Physics
URL标识	查看原文
WOS记录号	WOS:000231919000009
公开日期	2012-08-30
内容类型	期刊论文
源URL	[http://ir.itp.ac.cn/handle/311006/13760]
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, H , Chinese Acad Sci, Inst Theoret Phys, POB 2735, Beijing 100080, Peoples R China.
推荐引用方式 GB/T 7714	Zeng, DF,Wei, H,Cai, RG,et al. Hessence: a new view of quintom dark energy[J]. CLASSICAL AND QUANTUM GRAVITY,2005,22(16):3189-3202.
APA	Zeng, DF,Wei, H,Cai, RG,&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	Zeng, DF,et al."Hessence: a new view of quintom dark energy".CLASSICAL AND QUANTUM GRAVITY 22.16(2005):3189-3202.