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题名: Unified first law and the thermodynamics of the apparent horizon in the FRW universe
作者: 蔡荣根 ;  Cao, Li-Ming
刊名: PHYSICAL REVIEW D
出版日期: 2007
卷号: 75, 期号:6, 页码:-
关键词: BLACK-HOLE DYNAMICS ;  GRAVITATIONAL WAVES ;  GENERAL RELATIVITY ;  GRAVITY ;  EQUATIONS ;  ENTROPY ;  ENERGY ;  TENSOR
学科分类: Physics
通讯作者: Cai, RG , Chinese Acad Sci, Inst Theoret Phys, POB 2735, Beijing 100080, Peoples R China
部门归属: Chinese Acad Sci, Inst Theoret Phys, Beijing 100080, Peoples R China; Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China
英文摘要: In this paper we revisit the relation between the Friedmann equations and the first law of thermodynamics. We find that the unified first law first proposed by Hayward to treat the outertrapping horizon of a dynamical black hole can be used to the apparent horizon (a kind of inner trapping horizon in the context of the FRW cosmology) of the FRW universe. We discuss three kinds of gravity theorties: Einstein theory, Lovelock thoery, and scalar-tensor theory. In Einstein theory, the first law of thermodynamics is always satisfied on the apparent horizon. In Lovelock theory, treating the higher derivative terms as an effective energy-momentum tensor, we find that this method can give the same entropy formula for the apparent horizon as that of black hole horizon. This implies that the Clausius relation holds for the Lovelock theory. In scalar-tensor gravity, we find, by using the same procedure, the Clausius relation no longer holds. This indicates that the apparent horizon of the FRW universe in the scalar-tensor gravity corresponds to a system of nonequilibrium thermodynamics. We show this point by using the method developed recently by Eling et al. for dealing with the f(R) gravity.
收录类别: SCI
原文出处: 查看原文
WOS记录号: WOS:000245333600043
Citation statistics: 
内容类型: 期刊论文
URI标识: http://ir.itp.ac.cn/handle/311006/5780
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:
Cai, Rong-Gen,Cao, Li-Ming. Unified first law and the thermodynamics of the apparent horizon in the FRW universe[J]. PHYSICAL REVIEW D,2007,75(6):-.
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