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题名: Corrected entropy-area relation and modified Friedmann equations
作者: 蔡荣根 ;  Cao, Li-Ming ;  Hu, Ya-Peng
刊名: JOURNAL OF HIGH ENERGY PHYSICS
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
学科分类: Physics
通讯作者: Cai, RG , Chinese Acad Sci, Inst Theoret Phys, POB 2735, Beijing 100190, Peoples R China
部门归属: [Cai, RG; Cao, LM; Hu, YP] Chinese Acad Sci, Inst Theoret Phys, Beijing 100190, Peoples R China; [Hu, YP] Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China
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.
资助者: NSFC, China[10325525, 90403029]; Chinese Academy of Sciences
收录类别: SCI
原文出处: 查看原文
WOS记录号: WOS:000258917400019
Citation statistics: 
内容类型: 期刊论文
URI标识: http://ir.itp.ac.cn/handle/311006/5495
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:
Cai, Rong-Gen,Cao, Li-Ming,Hu, Ya-Peng. Corrected entropy-area relation and modified Friedmann equations[J]. JOURNAL OF HIGH ENERGY PHYSICS,2008(8):-.
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