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Thermodynamic behavior of the Friedmann equation at the apparent horizon of the FRW universe
文献类型：期刊论文
| 作者 | Akbar, M.; Cai, Rong-Gen ; Akbar, M , Chinese Acad Sci, Inst Theoret Phys, POB 2735, Beijing 100080, Peoples R China
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| 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 |
| ISSN号 | 1550-7998 |
| 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. |
| 学科主题 | Physics |
| URL标识 | 查看原文 |
| WOS记录号 | WOS:000246076900045 |
| 公开日期 | 2012-08-02 |
| 源URL | [http://ir.itp.ac.cn/handle/311006/5760]  |
| 专题 | 理论物理研究所_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 |
| 推荐引用方式 GB/T 7714 | Akbar, M.,Cai, Rong-Gen,Akbar, M , Chinese Acad Sci, Inst Theoret Phys, POB 2735, Beijing 100080, Peoples R China. Thermodynamic behavior of the Friedmann equation at the apparent horizon of the FRW universe[J]. PHYSICAL REVIEW D,2007,75(8):-. |
| 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 the Friedmann equation at the apparent horizon of the FRW universe.PHYSICAL REVIEW D,75(8),-. |
| MLA | Akbar, M.,et al."Thermodynamic behavior of the Friedmann equation at the apparent horizon of the FRW universe".PHYSICAL REVIEW D 75.8(2007):-. |
入库方式： OAI收割
来源：理论物理研究所
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