A NOTE ON THE UNIFIED FIRST LAW IN f(R) GRAVITY THEORY

被引：4
作者：
Zhang, Yi [1 ,2 ]
Gong, Yungui [2 ]
Zhu, Zong-Hong [1 ]
机构：
[1] Beijing Normal Univ, Dept Astron, Beijing 100875, Peoples R China
[2] Chongqing Univ Posts & Telecommun, Coll Math & Phys, Chongqing 400065, Peoples R China
来源：
INTERNATIONAL JOURNAL OF MODERN PHYSICS D | 2012年 / 21卷 / 04期
基金：
中国国家自然科学基金;
关键词：
Modified gravity; entropy; Friedmann equations; BLACK-HOLE ENTROPY; PROBE WMAP OBSERVATIONS; DARK ENERGY; APPARENT HORIZON; COSMOLOGICAL CONSEQUENCES; OBSERVATIONAL EVIDENCE; BRANE WORLD; THERMODYNAMICS; EQUATIONS; CONSTRAINTS;
D O I：
10.1142/S0218271812500344
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
Because of the dynamical equivalence between the f(R) gravity and the Brans-Dicke theory, the dynamical equation in the f(R) gravity is suggested to be derived from a view point of thermodynamics here. By a conformal transformation, the Brans-Dicke theory in the Jordan frame could be expressed as a minimal coupling scalar field theory in Einstein frame. Using the entropy-area relation d (S) over tilde = d (A) over tilde /4G, the correct Friedmann equations could be gotten in both frames. Furthermore, we also discuss the corresponding generalized Misner-Sharp energies for theoretical consistence.
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页数：13
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