1205.4678 (F. G. Alvarenga et al.)

Testing some f(R,T) gravity models from energy conditions    [PDF]

F. G. Alvarenga, M. J. S. Houndjo, A. V. Monwanou, Jean B. Chabi Orou

We consider f(R; T) theory of gravity, where R is the curvature scalar and T the trace of the energy momentum tensor. Attention is attached to the special case, f(R; T) = R + 2f(T) as a f(T) correction to the Einstein-Hilbert term. Two expressions are assumed for the function f(T), $\frac{a_1T^n+b_1}{a_2T^n+b_2}$ and $a_3ln^q(b_3T^m)$, where $a1$, $a2$, $b1$, $b2$, $n$, $a3$, $b3$, $q$ and $m$ are input parameters. We observe that by adjusting suitably these input parameters, energy conditions are satis?fied and viable f(R; T) models corresponding to the two assumptions of f(T) may be obtained.

View original: http://arxiv.org/abs/1205.4678