Journal of Modern Physics

Volume 4, Issue 1 (January 2013)

ISSN Print: 2153-1196   ISSN Online: 2153-120X

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Testing Some f(R,T) Gravity Models from Energy Conditions

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DOI: 10.4236/jmp.2013.41019    5,276 Downloads   9,141 Views  Citations

ABSTRACT

We consider f(R,T) theory of gravity, where R is the curvature scalar and T is the trace of the energy momentum tensor. Attention is attached to the special case, f(R,T)=R+2f(T) and two expressions are assumed for the function f(T),(a1Tn+b1)/(a2Tn+b2) and a3Inq(b3Tm), 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 can be satisfied. Moreover, an analysis of the perturbations and stabilities of de Sitter solutions and power-law solutions is performed with the use of the two models. The results show that for some values of the input parameters, for which energy conditions are satisfied, de Sitter solutions and power-law solutions may be stables.

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F. Alvarenga, M. Houndjo, A. Monwanou and J. Orou, "Testing Some f(R,T) Gravity Models from Energy Conditions," Journal of Modern Physics, Vol. 4 No. 1, 2013, pp. 130-139. doi: 10.4236/jmp.2013.41019.

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