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题名: Thermodynamic behavior of the Friedmann equation at the apparent horizon of the FRW universe
作者: Akbar, M. ;  蔡荣根
刊名: PHYSICAL REVIEW D
出版日期: 2007
卷号: 75, 期号:8, 页码:-
关键词: EXTENDED EINSTEIN EQUATIONS ;  CARDY-VERLINDE FORMULA ;  BLACK-HOLE ;  SYMMETRICAL-SOLUTIONS ;  PARTICLE CREATION ;  LOVELOCK GRAVITY ;  DESITTER SPACES ;  1ST LAW ;  ENTROPY ;  HOLOGRAPHY
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: It is shown that the differential form of Friedmann equation of a FRW universe can be rewritten as the first law of thermodynamics dE=TdS+WdV at apparent horizon, where E=rho V is the total energy of matter inside the apparent horizon, V is the volume inside the apparent horizon, W=(rho-P)/2 is the work density, rho and P are energy density and pressure of matter in the universe, respectively. From the thermodynamic identity one can derive that the apparent horizon r(A) has associated entropy S=A/4G and temperature T=kappa/2 pi in Einstein general relativity, where A is the area of apparent horizon and kappa is the surface gravity at apparent horizon of FRW universe. We extend our procedure to the Gauss-Bonnet gravity and more general Lovelock gravity and show that the differential form of Friedmann equations in these gravities can also be written as dE=TdS+WdV at the apparent horizon of FRW universe with entropy S being given by expression previously known via black hole thermodynamics.
收录类别: SCI
原文出处: 查看原文
WOS记录号: WOS:000246076900045
Citation statistics: 
内容类型: 期刊论文
URI标识: http://ir.itp.ac.cn/handle/311006/5760
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 the Friedmann equation at the apparent horizon of the FRW universe[J]. PHYSICAL REVIEW D,2007,75(8):-.
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