Corrected entropy-area relation and modified Friedmann equations
文献类型：期刊论文
| 作者 | Cai, Rong-Gen ; Cao, Li-Ming; Hu, Ya-Peng; Cai, RG , Chinese Acad Sci, Inst Theoret Phys, POB 2735, Beijing 100190, Peoples R China
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| 刊名 | JOURNAL OF HIGH ENERGY PHYSICS
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| 出版日期 | 2008 |
| 期号 | 8页码:- |
| 关键词 | Black-hole Entropy Loop Quantum-gravity Apparent Horizon 1st Law Thermodynamics Braneworld Dynamics Geometry |
| ISSN号 | 1126-6708 |
| 英文摘要 | Applying Clausius relation, delta Q = TdS, to apparent horizon of a FRW universe with any spatial curvature, and assuming that the apparent horizon has temperature T = 1/(2 pi(r) over tildeA), and a quantum corrected entropy-area relation, S = A/4G + alpha lnA/4G, where (r) over tildeA and A are the apparent horizon radius and area, respectively, and alpha is a dimensionless constant, we derive modified Friedmann equations, which does not contain a bounce solution. On the other hand, loop quantum cosmology leads to a modified Friedmann equation H-2 = 8 pi G/3 rho(1-rho/rho(crit)). We obtain an entropy expression of apparent horizon of FRW universe described by the modified Friedmann equation. In the limit of large horizon area, resulting entropy expression gives the above corrected entropy-area relation, however, the prefactor alpha in the logarithmic term is positive, which seems not consistent with most of results in the literature that quantum geometry leads to a negative contribution to the area formula of black hole entropy. |
| 学科主题 | Physics |
| URL标识 | 查看原文 |
| WOS记录号 | WOS:000258917400019 |
| 公开日期 | 2012-08-02 |
| 源URL | [http://ir.itp.ac.cn/handle/311006/5495]  |
| 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 | Cai, RG , Chinese Acad Sci, Inst Theoret Phys, POB 2735, Beijing 100190, Peoples R China |
| 推荐引用方式 GB/T 7714 | Cai, Rong-Gen,Cao, Li-Ming,Hu, Ya-Peng,et al. Corrected entropy-area relation and modified Friedmann equations[J]. JOURNAL OF HIGH ENERGY PHYSICS,2008(8):-. |
| APA | Cai, Rong-Gen,Cao, Li-Ming,Hu, Ya-Peng,&Cai, RG , Chinese Acad Sci, Inst Theoret Phys, POB 2735, Beijing 100190, Peoples R China.(2008).Corrected entropy-area relation and modified Friedmann equations.JOURNAL OF HIGH ENERGY PHYSICS(8),-. |
| MLA | Cai, Rong-Gen,et al."Corrected entropy-area relation and modified Friedmann equations".JOURNAL OF HIGH ENERGY PHYSICS .8(2008):-. |
入库方式： OAI收割
来源：理论物理研究所
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