The generalized second law in chameleon cosmology

In this paper, we investigate the validity of the generalized second law of thermodynamics in flat Friedmann-Lemaitre-Robertson-Walker chameleon cosmology where the boundary of the universe is assumed to be enclosed by the dynamical apparent horizon. It has been shown that, in a bouncing scenario for the universe with phantom crossing, the total entropy decreases with time in the contracting epoch, whereas, the dynamics of the internal and horizon entropies depend on the behaviour of both the equation of state and the Hubble parameters.