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题名: Thermodynamic behavior of field equations for f (R) gravity
作者: Akbar, M. ;  蔡荣根
刊名: PHYSICS LETTERS B
出版日期: 2007
卷号: 648, 期号:40942, 页码:243-248
关键词: CARDY-VERLINDE FORMULA ;  BLACK-HOLES ;  PARTICLE CREATION ;  DESITTER SPACES ;  1ST LAW ;  HORIZONS ;  ENTROPY
学科分类: Physics
通讯作者: Akbar, M , 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: 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.
收录类别: SCI
原文出处: 查看原文
WOS记录号: WOS:000246332600021
Citation statistics: 
内容类型: 期刊论文
URI标识: http://ir.itp.ac.cn/handle/311006/5734
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, Rong-Gen. Thermodynamic behavior of field equations for f (R) gravity[J]. PHYSICS LETTERS B,2007,648(40942):243-248.
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