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NULL ENERGY CONDITION AND DARK ENERGY MODELS
Qiu TT(邱涛涛); Cai YF(蔡一夫); Zhang XM(张新民); Qiu, TT; Cai, YF; Zhang, XM
2008
发表期刊MODERN PHYSICS LETTERS A
卷号23期号:32页码:2787-2798
通讯作者[Qiu, Taotao ; Cai, Yi-Fu ; Zhang, Xinmin] Chinese Acad Sci, Inst High Energy Phys, Beijing 100049, Peoples R China
文章类型Article
摘要Null Energy Condition (NEC) requires the equation of state (EoS) of the universe w(u) satisfy w(u) >= -1, which implies, for instance in a universe with matter and dark energy dominating w(u) = w(m)Omega(m) + w(de)Omega(de) = w(de)Omega(de) >= -1. In this paper we study constraints on the dark energy models from the requirement of the NEC. We will show that with Omega(de) similar to 0.7, w(de) < -1 at present epoch is possible. However, NEC excludes the possibility of w(de), < -1 forever as happened in the Phantom model, but if W-de < -1 stays for a short period of time as predicted in the Quintom theory, NEC can be satisfied. We take three examples of Quintom models of dark energy, namely the phenomenological EoS, the two-scalar-field model and the single scalar model with a modified Dirac-Born-Infeld (DB1) Lagrangian to show how this happens.
关键词Quintom NEC
学科领域Physics
研究领域[WOS]Physics ; Physics
DOI10.1142/S0217732308026194
URL查看原文
语种英语
研究领域[WOS]Physics ; Physics
WOS类目Physics, Nuclear ; Physics, Particles & Fields ; Physics, Mathematical
WOS记录号WOS:000260274200007
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被引频次:5[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/239824
专题理论物理室
作者单位中国科学院高能物理研究所
推荐引用方式
GB/T 7714
Qiu TT,Cai YF,Zhang XM,et al. NULL ENERGY CONDITION AND DARK ENERGY MODELS[J]. MODERN PHYSICS LETTERS A,2008,23(32):2787-2798.
APA 邱涛涛,蔡一夫,张新民,Qiu, TT,Cai, YF,&Zhang, XM.(2008).NULL ENERGY CONDITION AND DARK ENERGY MODELS.MODERN PHYSICS LETTERS A,23(32),2787-2798.
MLA 邱涛涛,et al."NULL ENERGY CONDITION AND DARK ENERGY MODELS".MODERN PHYSICS LETTERS A 23.32(2008):2787-2798.
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