Subhajit Saha, Subenoy Chakraborty
Recent observational evidences claim an accelerating expansion of the universe at present epoch. It is commonly incorporated in standard cosmology by introduction of an exotic matter(that violates the strong energy condition) known as dark energy(DE). As event horizon exists for accelerating universe so there are lot of works for universal thermodynamics(i.e., thermodynamics of the universe bounded by apparent or event horizon). Recently, thermodynamical equilibrium has been examined for both the horizons. In the present letter we show that universal thermodynamics with event horizon is favoured by DE from the point of view of thermodynamical prescription.
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http://arxiv.org/abs/1212.0003
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