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International Journal of Theoretical Physics

, Volume 53, Issue 9, pp 3089–3094 | Cite as

Viscous Cosmology and Thermodynamics of Apparent Horizon in Modified Friedman-Robertson-Walkers Universe

  • J. Sadeghi
  • J. Naji
  • H. Vaez
  • B. Khanpour
Article

Abstract

In this paper, we write modified Friedman-Robertson-Walkers (FRW) equation in the form of first law of thermodynamics at the apparent horizon. We consider the universe filled with the viscous fluid. Here we employ the general expression of temperature gravity and entropy at the apparent horizon of FRW universe and obtain the generalized first law of thermodynamics at the special condition for the modified FRW equation. The generalized first law of thermodynamics help us to arrange the α 1, α 2, β 1 and β 2 in modified Friedman-Robertson-Walkers equation.

Keywords

Modified FRW cosmology Thermodynamics Viscous fluid 

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Copyright information

© Springer Science+Business Media New York 2014

Authors and Affiliations

  1. 1.Sciences Faculty, Department of Physics, Ayattolah AmoliAzad UniversityAmolIran
  2. 2.Faculty of Sciences, Departments of PhysicsIlam UniversityIlamIran
  3. 3.Young Researchers Club, Ayatollah Amoli BranchIslamic Azad UniversityAmolIran

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