Viscous Cosmology and Thermodynamics of Apparent Horizon
M. Ali Akbar
Abstract
M. Ali Akbar
Abstract
It is shown that the differential form of Friedmann equations of FRW universe can be recast as a similar form of the first law,TAdSA = dE + WdV, of thermodynamics at the apparent horizon of FRW universe filled with the viscous fluid. It is also shown that the generalized second law of thermodynamics holds at the apparent horizon of FRW universe and preserves dominant energy condition.
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It is shown that the differential form of Friedmann equations of FRW universe can be recast as a similar form of the first law,TAdSA = dE + WdV, of thermodynamics at the apparent horizon of FRW universe filled with the viscous fluid. It is also shown that the generalized second law of thermodynamics holds at the apparent horizon of FRW universe and preserves dominant energy condition.
Key concepts: Friedmann–Lemaître–Robertson–Walker metric, Apparent horizon, Physics, Horizon, Second law of thermodynamics, First law of thermodynamics, Thermodynamics, Universe