From the early to the late time universe within f(T,T)f(T,\mathcal{T}) gravity

preprint2015arXivOpen access

Abstract

In this paper we perform the reconstruction scheme of the gravitational action within f(T,T)f(T,\mathcal{T}) gravity, where TT and T\mathcal{T} denote the torsion scalar and the trace of the energy momentum tensor, respectively. We particularly focus our attention on the case where the algebraic function f(T,T)f(T,\mathcal{T}) is decomposed as a sum of two functions f1(T)f_1(T) and f2(T)f_2(\mathcal{T}), i.e, f(T,T)=f1(T)+f2(T)f(T,\mathcal{T})=f_{1}(T)+f_{2}(\mathcal{T}). The description is essentially based on the scale factor and then, we consider two interesting and realistic expressions of this parameter and reconstruct the action corresponding to each phase of the universe. Our results show that some f(T,T)f(T,\mathcal{T}) models are able to describe the evolution of the universe from the inflation phase to the late time dark energy dominated phase.

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