Plane symmetric model in f(R, T) gravity
Department of Mathematical Sciences, University of Zululand, Kwadlangezwa, 3886, South Africa
2 Faculty of Natural Sciences, Mangosuthu University of Technology, Umlazi, South Africa
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Accepted: 3 March 2020
Published online: 17 March 2020
A plane symmetric Bianchi-I model is explored in f(R, T) gravity, where R is the Ricci scalar and T is the trace of energy–momentum tensor. The solutions are obtained with the consideration of a specific Hubble parameter which yields a constant deceleration parameter. The various evolutionary phases are identified under the constraints obtained for physically viable cosmological scenarios. Although a single (primary) matter source is taken, due to the coupling between matter and f(R, T) gravity, an additional matter source appears, which mimics a perfect fluid or exotic matter. The solutions are also extended to the case of a scalar field model. The kinematical behavior of the model remains independent of f(R, T) gravity. The physical behavior of the effective matter also remain the same as in general relativity. It is found that f(R, T) gravity can be a good alternative to the hypothetical candidates of dark energy to describe the present accelerating expansion of the universe.
© Società Italiana di Fisica and Springer-Verlag GmbH Germany, part of Springer Nature, 2020