Cosmological models lled with a perfect uid source in the f(R,T) theory ofgravity

Abstract

We investigated the physical behavior of an LRS Bianchi type I cosmological model in the framework of thef(R;T) theory of gravity in the presence of a perfect uid, where R is the Ricci scalar and T is the trace of the stressenergy tensor of the matter. In order to obtain a deterministic solution of the eld equations we assumed the speciallaw of variation of the Hubble parameter proposed by Berman that yields the constant deceleration parameter. Somephysical properties of the models are discussed.