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Cheng-Weyl vector field and its cosmological application
Wei, Hao; Cai, Rong-Gen; Wei, H , Tsinghua Univ, Tsinghua Ctr Astrophys, Dept Phys, Beijing 100084, Peoples R China
2007
发表期刊JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
ISSN1475-7516
期号9页码:-
摘要Weyl's idea on scale invariance was resurrected by Cheng in 1988. The requirement of local scale invariance leads to a completely new vector field, which we call the 'Cheng-Weyl vector field'. The Cheng-Weyl vector field couples only to a scalar field and the gravitational field naturally. It does not interact with other known matter in the standard model of particle physics. In the present work, the ( generalized) Cheng-Weyl vector field coupled with the scalar field and its cosmological application are investigated. A mixture of the scalar field and a so-called 'cosmic triad' of three mutually orthogonal Cheng-Weyl vector fields is regarded as the dark energy in the universe. The cosmological evolution of this 'mixed' dark energy model is studied. We find that the effective equation-of-state parameter of the dark energy can cross the phantom divide w(de) = -1 in some cases; the first and second cosmological coincidence problems can be alleviated at the same time in this model.
部门归属Tsinghua Univ, Tsinghua Ctr Astrophys, Dept Phys, Beijing 100084, Peoples R China; Chinese Acad Sci, Inst Theoret Phys, Beijing 100080, Peoples R China
关键词Dark Energy-model Equation-of-state Viscous Modified Gravity High-redshift Supernovae Hubble-space-telescope Accelerating Universe Coincidence Problem Constant Problem Phantom Divide W=-1 Barrier
学科领域Physics
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收录类别SCI
WOS记录号WOS:000249811000007
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被引频次:9[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.itp.ac.cn/handle/311006/5674
专题理论物理所SCI论文
通讯作者Wei, H , Tsinghua Univ, Tsinghua Ctr Astrophys, Dept Phys, Beijing 100084, Peoples R China
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Wei, Hao,Cai, Rong-Gen,Wei, H , Tsinghua Univ, Tsinghua Ctr Astrophys, Dept Phys, Beijing 100084, Peoples R China. Cheng-Weyl vector field and its cosmological application[J]. JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS,2007(9):-.
APA Wei, Hao,Cai, Rong-Gen,&Wei, H , Tsinghua Univ, Tsinghua Ctr Astrophys, Dept Phys, Beijing 100084, Peoples R China.(2007).Cheng-Weyl vector field and its cosmological application.JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS(9),-.
MLA Wei, Hao,et al."Cheng-Weyl vector field and its cosmological application".JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS .9(2007):-.
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