Entropy and statefinder diagnosis in chameleon cosmology

Abstract

In this paper, the generalized second law (GSL) of thermodynamics and entropy is revisited in the context of cosmological models with bouncing behavior such as chameleon cosmology where the boundary of the universe is assumed to be enclosed by the dynamical apparent horizon. From a thermodynamic point of view, to link between thermodynamic and geometric parameters in cosmological models, we introduce "entropy rate of change multiplied by the temperature" as a model independent thermodynamic state parameter together with the well known $\{r,s\}$ statefinder to differentiate the dark energy models.

11 pages, 5 figures. will be published in Astrophys. Space Sci

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• Stability analysis of agegraphic dark energy in Brans-Dicke cosmology
• Stability analysis and observational constraints in scalar tensor theory
• Observational constraints in scalar tensor theory with tachyonic potential
• Geometric and thermodynamic properties in Gauss-Bonnet gravity
• Phase plane analysis and statefinder diagnostic of agegraphic dark energy in 5D Brans-Dicke cosmology