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Thermodynamics in f(R) gravity in the Palatini formalism
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Thermodynamics in f(R) gravity in the Palatini formalism
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We investigate thermodynamics of the apparent horizon in $f(R)$ gravity in the Palatini formalism with non-equilibrium and equilibrium descriptions. We demonstrate that it is more transparent to understand the horizon entropy in the equilibrium framework than that in the non-equilibrium one. Furthermore, we show that the second law of thermodynamics can be explicitly verified in both phantom and non-phantom phases for the same temperature of the universe outside and inside the apparent horizon.
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Cited by 1 Pith paper
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Cosmological horizon thermodynamics in Gauss-Bonnet quasi-dilaton Massive Gravity
Gauss-Bonnet quasi-dilaton massive gravity is claimed to obey horizon thermodynamics and the holographic entropy bound, provided the Gauss-Bonnet coupling is non-negative.
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