The generalized second law of gravitational thermodynamics on the apparent horizon in f(R)-gravity
The generalized second law of gravitational thermodynamics on the apparent horizon in f(R)-gravity
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DOI：
10.1209/0295-5075/98/30010
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发表时间：
2012-01
期刊：
影响因子：
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通讯作者：
K. Karami;M. S. Khaledian;N. Abdollahi
中科院分区：
文献类型：
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作者：
K. Karami;M. S. Khaledian;N. Abdollahi
我们在 f(R)-引力框架内研究热力学的广义第二定律 (GSL)。我们认为 FRW 宇宙仅充满普通物质，被霍金温度的动态视视界所包围。对于可行的修正引力模型 f(R)=R−α/R+βR2，我们检验了 GSL 在早期暴胀和晚期加速时代的有效性。我们的结果表明，对于所选择的与物质最小耦合的f(R)重力模型，仅在物质状态方程参数的特殊范围内才满足暴胀早期的GSL。但在加速后期，GSL始终受到尊重。
We investigate the generalized second law (GSL) of thermodynamics in the framework of f(R)-gravity. We consider a FRW universe filled only with ordinary matter enclosed by the dynamical apparent horizon with the Hawking temperature. For a viable modified gravity model as f(R)=R−α/R+βR2, we examine the validity of the GSL during the early-inflation and late-acceleration eras. Our results show that for the selected f(R)-gravity model minimally coupled with matter, the GSL in the early-inflation epoch is satisfied only for the special range of the equation-of-state parameter of matter. But in the late-acceleration regime, the GSL is always respected.