Generalized Second Law of Thermodynamics in Extended Theories of Gravity

Details Generalized Second Law of Thermodynamics in Extended Theories of Gravity Generalized Second Law of Thermodynamics in Extended Theories of Gravity

2008-08-25

arxiv.org/abs/0808.3308v1

Int.J.Theor.Phys.48:2665-2671,2009

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

10 pages

Scientific paper

10.1007/s10773-009-0056-4

By employing the general expression of temperature $T_{h}=|\kappa|/2\pi = \frac{1}{2\pi \tilde{r}_{A}}(1-\frac{\dot{\tilde{r}}_{A}}{2H\tilde{r}_{A}})$ associated with the apparent horizon of a FRW universe and assuming a region of FRW universe enclosed by the apparent horizon as a thermal system in equilibrium, we are able to show that the generalized second law of thermodynamics holds in Gauss-Bonnet gravity and in more general Lovelock gravity.

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