Cheng-Weyl vector field and its cosmological application

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	Cheng-Weyl vector field and its cosmological application
	Wei, H , Tsinghua Univ, Tsinghua Ctr Astrophys, Dept Phys, Beijing 100084, Peoples R China; Wei, Hao; Cai, Rong-Gen
刊名	JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
	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
ISSN号	1475-7516
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.
学科主题	Physics
URL标识	查看原文
WOS记录号	WOS:000249811000007
公开日期	2012-08-02
内容类型	期刊论文
源URL	[http://ir.itp.ac.cn/handle/311006/5674]
专题	理论物理研究所_理论物理所1978-2010年知识产出
通讯作者	Wei, H , Tsinghua Univ, Tsinghua Ctr Astrophys, Dept Phys, Beijing 100084, Peoples R China
推荐引用方式 GB/T 7714	Wei, H , Tsinghua Univ, Tsinghua Ctr Astrophys, Dept Phys, Beijing 100084, Peoples R China,Wei, Hao,Cai, Rong-Gen. Cheng-Weyl vector field and its cosmological application[J]. JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS,2007(9):-.
APA	Wei, H , Tsinghua Univ, Tsinghua Ctr Astrophys, Dept Phys, Beijing 100084, Peoples R China,Wei, Hao,&Cai, Rong-Gen.(2007).Cheng-Weyl vector field and its cosmological application.JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS(9),-.
MLA	Wei, H , Tsinghua Univ, Tsinghua Ctr Astrophys, Dept Phys, Beijing 100084, Peoples R China,et al."Cheng-Weyl vector field and its cosmological application".JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS .9(2007):-.