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Corrected entropy-area relation and modified Friedmann equations
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
发表期刊JOURNAL OF HIGH ENERGY PHYSICS
ISSN1126-6708
期号8页码:-
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.
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
关键词Black-hole Entropy Loop Quantum-gravity Apparent Horizon 1st Law Thermodynamics Braneworld Dynamics Geometry
学科领域Physics
资助者NSFC, China[10325525, 90403029]; Chinese Academy of Sciences ; NSFC, China[10325525, 90403029]; Chinese Academy of Sciences ; NSFC, China[10325525, 90403029]; Chinese Academy of Sciences ; NSFC, China[10325525, 90403029]; Chinese Academy of Sciences
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收录类别SCI
资助者NSFC, China[10325525, 90403029]; Chinese Academy of Sciences ; NSFC, China[10325525, 90403029]; Chinese Academy of Sciences ; NSFC, China[10325525, 90403029]; Chinese Academy of Sciences ; NSFC, China[10325525, 90403029]; Chinese Academy of Sciences
WOS记录号WOS:000258917400019
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被引频次:65[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.itp.ac.cn/handle/311006/5495
专题理论物理所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
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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):-.
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