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题名: Friedmann equations of FRW universe in scalar-tensor gravity, f(R) gravity and first law of thermodynamics
作者: Akbar, M ;  蔡荣根
刊名: PHYSICS LETTERS B
出版日期: 2006
卷号: 635, 期号:1, 页码:7-10
关键词: BLACK-HOLE ;  ENTROPY ;  HORIZONS
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
英文摘要: In the paper, [R.G. Cai, S.P. Kim, JHEP 0502 (2005) 050. hep-th/0501055], it is shown that by applying the first law of thermodynamics to the apparent horizon of an FRW universe and assuming the geometric entropy given by a quarter of the apparent horizon area, one can derive the Friedmann equations describing the dynamics of the universe with any spatial curvature; using the entropy formula for the static spherically symmetric black holes in Gauss-Bonnet gravity and in more general Lovelock gravity, where the entropy is not proportional to the horizon area, one can also obtain the corresponding Friedmann equations in each gravity. In this Letter we extend the study of the above mentioned paper to the cases of scalar-tensor gravity and f (R) gravity, and discuss the implication of results. (c) 2006 Elsevier B.V. All rights reserved.
收录类别: SCI
原文出处: 查看原文
WOS记录号: WOS:000236483100002
Citation statistics: 
内容类型: 期刊论文
URI标识: http://ir.itp.ac.cn/handle/311006/6017
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:
Akbar, M,Cai, RG. Friedmann equations of FRW universe in scalar-tensor gravity, f(R) gravity and first law of thermodynamics[J]. PHYSICS LETTERS B,2006,635(1):7-10.
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