On dark energy models of single scalar field
Li, MZ; Qiu, TT; Cai, YF; Zhang, XM;张新民
刊名JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
2012
期号4页码:3
关键词dark energy theory cosmological perturbation theory
学科分类Astronomy & Astrophysics; Physics
DOI10.1088/1475-7516/2012/04/003
英文摘要In this paper we revisit the dynamical dark energy model building based on single scalar field involving higher derivative terms. By imposing a degenerate condition on the higher derivatives in curved spacetime, one can select the models which are free from the ghost mode and the equation of state is able to cross the cosmological constant boundary smoothly, dynamically violate the null energy condition. Generally the Lagrangian of this type of dark energy models depends on the second derivatives linearly. It behaves like an imperfect fluid, thus its cosmological perturbation theory needs to be generalized. We also study such a model with explicit form of degenerate Lagrangian and show that its equation of state may cross - 1 without any instability.
收录类别SCI
WOS记录号WOS:000303665000003
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被引频次:13[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/311005/224375
专题中国科学院高能物理研究所_理论物理室_期刊论文
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Li, MZ,Qiu, TT,Cai, YF,et al. On dark energy models of single scalar field[J]. JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS,2012(4):3.
APA Li, MZ,Qiu, TT,Cai, YF,&Zhang, XM;张新民.(2012).On dark energy models of single scalar field.JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS(4),3.
MLA Li, MZ,et al."On dark energy models of single scalar field".JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS .4(2012):3.
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