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题名: Cheng-Weyl vector field and its cosmological application
作者: Wei, Hao ;  蔡荣根
刊名: JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
出版日期: 2007
期号: 9, 页码:-
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
学科分类: Physics
通讯作者: Wei, H , Tsinghua Univ, Tsinghua Ctr Astrophys, Dept Phys, Beijing 100084, Peoples R China
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
英文摘要: 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.
收录类别: SCI
原文出处: 查看原文
WOS记录号: WOS:000249811000007
Citation statistics: 
内容类型: 期刊论文
URI标识: http://ir.itp.ac.cn/handle/311006/5674
Appears in Collections:理论物理所1978-2010年知识产出_期刊论文

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Recommended Citation:
Wei, Hao,Cai, Rong-Gen. Cheng-Weyl vector field and its cosmological application[J]. JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS,2007(9):-.
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