Thermodynamics with Interacting Dark Energy in Magnetic Universe

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In this paper, we investigate the validity of generalized second law of thermodynamics for FRW universe in the framework of non-linear electrodynamics. We assume that the universe is composed of dark matter, magnetic field and some unknown dark energy component with two different interacting terms Q and \tilde{Q}. It is found that the energy transfer from dark energy to magnetic field depends upon the sign of interacting terms. For Q<\tilde{Q}, dark matter and magnetic field receive some part of the dark energy density while the decay of dark energy occurs for Q>\tilde{Q}. In this scenario, we calculate energy densities of dark matter and other dark energy fluid. We check the validity of generalized second law of thermodynamics bounded by Hubble, apparent, particle and event horizons. It turns out that this law always holds on the Hubble and apparent horizons but fails on the particle and event horizons for both interacting and non-interacting cases.
2013-06-15