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On dark energy models of single scalar field
Li, Mingzhe1,7; Qiu, Taotao2,3,4; Cai, Yifu5; Zhang, Xinmin6
2012-04-01
Source PublicationJOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
ISSN1475-7516
Issue4Pages:003
AbstractIn 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.
KeywordDark Energy Theory Cosmological Perturbation Theory
Subject AreaAstronomy & Astrophysics
WOS HeadingsScience & Technology ; Physical Sciences
DOI10.1088/1475-7516/2012/04/003
WOS KeywordQUINTOM MODEL ; COSMOLOGICAL CONSEQUENCES ; ACCELERATING UNIVERSE ; COSMIC ACCELERATION ; K-INFLATION ; CONSTRAINTS ; GRAVITY ; BRANE ; PERTURBATIONS ; COMPONENT
Indexed BySCI
Language英语
WOS Research AreaAstronomy & Astrophysics ; Physics
WOS SubjectAstronomy & Astrophysics ; Physics, Particles & Fields
WOS IDWOS:000303665000003
Citation statistics
Document Type期刊论文
Identifierhttp://libir.pmo.ac.cn/handle/332002/7988
Collection空间目标与碎片观测研究基地
Affiliation1.Nanjing Univ, Dept Phys, Nanjing 210093, Jiangsu, Peoples R China
2.Natl Taiwan Univ, Dept Phys, Taipei 10617, Taiwan
3.Natl Taiwan Univ, Ctr Theoret Sci, Taipei 10617, Taiwan
4.Natl Taiwan Univ, Leung Ctr Cosmol & Particle Astrophys, Taipei 106, Taiwan
5.Arizona State Univ, Dept Phys, Tempe, AZ 85287 USA
6.Chinese Acad Sci, Inst High Energy Phys, Beijing 100049, Peoples R China
7.Nanjing Univ, Purple Mt Observ, Joint Ctr Particle Nucl Phys & Cosmol, Nanjing 210093, Jiangsu, Peoples R China
Recommended Citation
GB/T 7714
Li, Mingzhe,Qiu, Taotao,Cai, Yifu,et al. On dark energy models of single scalar field[J]. JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS,2012(4):003.
APA Li, Mingzhe,Qiu, Taotao,Cai, Yifu,&Zhang, Xinmin.(2012).On dark energy models of single scalar field.JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS(4),003.
MLA Li, Mingzhe,et al."On dark energy models of single scalar field".JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS .4(2012):003.
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