Abstract
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.
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Notes
\(\rho \ge 0\), \(\rho +p\ge 0\).
\(\rho +p\ge 0\).
\(\rho \ge |p|\), i.e., \(\rho \pm p\ge 0\).
\(\rho +3p\ge 0\).
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Acknowledgements
We are thankful to the reviewer for showing his deep interest in this work. His suggestions and constructive comments were very helpful to improve the presentation of the results. Vijay Singh expresses his sincere thank to the University of Zululand, South Africa, for providing a postdoctoral fellowship and necessary facilities. This work is based on the research supported wholly/in part by the National Research Foundation of South Africa (Grant Numbers: 118511).
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Singh, V., Beesham, A. Plane symmetric model in f(R, T) gravity. Eur. Phys. J. Plus 135, 319 (2020). https://doi.org/10.1140/epjp/s13360-020-00314-x
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DOI: https://doi.org/10.1140/epjp/s13360-020-00314-x