Gauss-Bonnet and Lovelock Gravities and the Generalized Second Law of Thermodynamics

• 来源期刊: 中国物理快报（英文版）
• 年，卷（期）: 2009,（6）
• 页码范围: 39-42
• 页数: 4页
• 语种: 英文

摘要

It has been shown[Chin.Phys.Lett.25 (2008) 4199]that the generalized second law of thermodynamics holds in Einstein gravity.Here we extend this procedure for Gauss-Bonnet and Lovelock gravities.It is shown that by employing the general expression for temperature Th=|k|/2π=1/xπrAT(1-(rA)/2HrA)associated with the apparent horizon of a Friedman-Robertson-Walker (FRW) universe and assuming Tm= bTh,we are able to construct conditions for which the generalized second law holds in Gauss-Bonnet and Lovelock gravities,where Tm and Th axe the temperatures of the source and the horizon respectively.