Thermodynamics in f(R,T) theory of gravity

By Muhammad Sharif, M. Zubair. 2012

347 citations recorded by the source corpus.

A non-equilibrium picture of thermodynamics is discussed at the apparent horizon of FRW universe in f(R,T) gravity, where R is the Ricci scalar and T is the trace of the energy-momentum tensor. We take two forms of the energy-momentum tensor of dark components and demonstrate that equilibrium description of thermodynamics is not achievable in both cases. We check the validity of the first and second law of thermodynamics in this scenario. It is shown that the Friedmann equations can be expressed in the form of first law of thermodynamics ThdS'h+ThdS' = −dE'+W'dV, where dS' is the entropy production term. Finally, we conclude that the second law of thermodynamics holds both in phantom and non-phantom phases.

Subfields: Astronomy and Astrophysics, Nuclear and High Energy Physics, Statistical and Nonlinear Physics

View Paper: https://www.semanticscholar.org/paper/cdd5456e7b84259110dd3bd96d10a531fdf04b64

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Citations in the corpus

Generalized Curvature-Matter Couplings in Modified Gravity (2014, background): “In [135], a non-equilibrium picture of thermodynamics was discussed at the apparent horizon of an FRW universe in f(R, T ) gravity, where the validity of the first and second law of thermodynamics in this scenario were checked.”