1207.1646 (M. J. S. Houndjo et al.)

Thermodynamics in Little Rip cosmology in the framework of a type of f(R; T) gravity    [PDF]

M. J. S. Houndjo, F. G. Alvarenga, Manuel E. Rodrigues, Deborah F. Jardim

Cosmological reconstruction of Little Rip model in f(R; T) gravity is investigated, where R is the curvature scalar and T the trace of the energy momentum tensor. The model perfectly reproduces the present stage of the universe, characterized by the \LambdaCDM model, without singularity at future finite-time (without the Big Rip). The input parameters are determined according to Supernovae Cosmology data and perfectly fit with the WMAP around the Little Rip. Moreover, the thermodynamics is considered in this Little Rip cosmology and it is illustrated that the second law of thermodynamics is always satisfied around the Little Rip universe for the temperature inside the horizon being the same as that of the apparent horizon.

View original: http://arxiv.org/abs/1207.1646