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Thermodynamic behavior of field equations for f (R) gravity
Akbar, M.; Cai, Rong-Gen; Akbar, M , Chinese Acad Sci, Inst Theoret Phys, POB 2735, Beijing 100080, Peoples R China
2007
发表期刊PHYSICS LETTERS B
ISSN0370-2693
卷号648期号:40942页码:243-248
摘要Recently it has shown that Einstein's field equations can be rewritten into a form of the first law of thermodynamics at apparent horizon of Friedmann-Robertson-Walker (FRW) universe, which indicates intrinsic thermodynamic properties of apparent horizon of spacetime. In the present Letter we deal with the so-called f(R) gravity, whose action is a function of the curvature scalar R. In the setup of FRW universe, we show that the field equations can also be cast to a similar form, dE = T dS + WdV + T dS, at the apparent horizon, where W = (rho = P)/2, E is the energy of perfect fluid with energy density p and pressure P inside the apparent horizon. T and S = Af'(R)/4G are temperature and entropy associated with the apparent horizon, respectively. Compared to the case of Einstein's general relativity, an additional term dS appears here. The appearance of the additional term is consistent with the argument recently given by Eling et al. [C. Eling, R. Guedens, T. Jacobson, Phys. Rev. Lett. 96 (2006) 121301, gr-qc/0602001] that the horizon thermodynamics is non-equilibrium one for the f (R) gravity. (C) 2007 Elsevier B.V. All rights reserved.
部门归属Chinese Acad Sci, Inst Theoret Phys, Beijing 100080, Peoples R China
关键词Cardy-verlinde Formula Black-holes Particle Creation Desitter Spaces 1st Law Horizons Entropy
学科领域Physics
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收录类别SCI
WOS记录号WOS:000246332600021
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被引频次:172[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/311006/5734
专题理论物理所1978-2010年知识产出
通讯作者Akbar, M , Chinese Acad Sci, Inst Theoret Phys, POB 2735, Beijing 100080, Peoples R China
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Akbar, M.,Cai, Rong-Gen,Akbar, M , Chinese Acad Sci, Inst Theoret Phys, POB 2735, Beijing 100080, Peoples R China. Thermodynamic behavior of field equations for f (R) gravity[J]. PHYSICS LETTERS B,2007,648(40942):243-248.
APA Akbar, M.,Cai, Rong-Gen,&Akbar, M , Chinese Acad Sci, Inst Theoret Phys, POB 2735, Beijing 100080, Peoples R China.(2007).Thermodynamic behavior of field equations for f (R) gravity.PHYSICS LETTERS B,648(40942),243-248.
MLA Akbar, M.,et al."Thermodynamic behavior of field equations for f (R) gravity".PHYSICS LETTERS B 648.40942(2007):243-248.
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