• Evolution of holographic dark energy with interaction term $Q \propto H\rho_{\rm de}$ and generalized second law

    • Fulltext


        Click here to view fulltext PDF

      Permanent link:

    • Keywords


      Dark energy; generalized second law; cosmological evolution; thermodynamics.

    • Abstract


      A flat FLRW Universe with dark matter and dark energy, which are interacting witheach other, is considered. The dark energy is represented by the holographic dark energy model and the interaction term is taken as proportional to the dark energy density. We have studied the cosmological evolution and analysed the validity of the generalized second law of thermodynamics (GSL) under thermal equilibrium conditions and non-equilibrium conditions. We have found thatthe GSL is completely valid at the apparent horizon but violated at the event horizon under thermal equilibrium condition. Under thermal non-equilibrium condition, for the GSL to be valid, we found out that the temperature of the dark energy must be greater than the temperature of the apparent horizon if the dark energy behaves as a quintessence fluid.

    • Author Affiliations


      Praseetha P1 Mathew Titus K1

      1. Department of Physics, Cochin University of Science and Technology, Cochin 682 022, India
    • Dates

  • Pramana – Journal of Physics | News

    • Editorial Note on Continuous Article Publication

      Posted on July 25, 2019

      Click here for Editorial Note on CAP Mode

© 2021-2022 Indian Academy of Sciences, Bengaluru.