Comment on "A holographic model of dark energy and the thermodynamics of a non-flat accelerated expanding universe", by M.R. Setare and S. Shafei (JCAP 09 (2006) 011, arXiv:gr-qc/0606103)

Abstract

Authors of ref. [1], M.R. Setare and S. Shafei (JCAP 09 (2006) 011), studied the thermodynamics of a holographic dark energy model in a non-flat universe enclosed by the apparent horizon $R_A$ and the event horizon measured from the sphere of the horizon named $L$. In section 3 in ref. [1], Authors showed that for $R_A$ the generalized second law of thermodynamics is respected, while for $L$ it is satisfied for the special range of the deceleration parameter. Here we present that their calculations for $R_A$ should be revised. Also we show that their conclusion for $L$ is not true and the generalized second law is hold for the present time independently of the deceleration parameter. Also if we take into account the contribution of dark matter in the generalized second law which is absent in ref. [1], then the generalized second law for $L$ is violated for the present time.

arXiv comment5 pages

References in corpus (2)

• Hawking Radiation of Apparent Horizon in a FRW Universe
• Interacting holographic dark energy model and generalized second law of thermodynamics in non-flat universe

Cited by in corpus (5)

• f(T) modified teleparallel gravity models as an alternative for holographic and new agegraphic dark energy models
• The generalized second law of gravitational thermodynamics on the apparent and event horizons in FRW cosmology
• Holographic f(T)-gravity model with power-law entropy correction
• Scalar-Tensor Theory of Gravity and Generalized Second Law of Thermodynamics on the Event Horizon
• Interacting viscous entropy-corrected holographic scalar field models of dark energy with time-varying G in modified FRW cosmology