The generalized second law for the interacting new agegraphic dark energy in a non-flat FRW universe enclosed by the apparent horizon

TL;DR

This paper examines the validity of the generalized second law of thermodynamics in a non-flat universe with interacting new agegraphic dark energy, showing it always holds under thermal equilibrium conditions.

Contribution

It demonstrates the generalized second law's validity in a non-flat FRW universe with interacting dark energy and cold dark matter, considering the apparent horizon boundary.

Findings

The equation of state parameter can cross the phantom divide.

The generalized second law is always satisfied in thermal equilibrium.

Entropy evolution depends on the dark energy's equation of state.

Abstract

We investigate the validity of the generalized second law of gravitational thermodynamics in a non-flat FRW universe containing the interacting new agegraphic dark energy with cold dark matter. The boundary of the universe is assumed to be enclosed by the dynamical apparent horizon. We show that for this model, the equation of state parameter can cross the phantom divide. We also present that for the selected model under thermal equilibrium with the Hawking radiation, the generalized second law is always satisfied throughout the history of the universe. Whereas, the evolution of the entropy of the universe and apparent horizon, separately, depends on the equation of state parameter of the interacting new agegraphic dark energy model.