TITLE:
Time Varying Deceleration Parameter in f(R, T) Gravity
AUTHORS:
Rishi Kumar Tiwari, Sushil Kumar Mishra, Sateesh Kumar Mishra, Değer Sofuoğlu
KEYWORDS:
Periodic Deceleration Parameter, f(R, T) Gravity, Bianchi Type-I Universe
JOURNAL NAME:
Journal of Applied Mathematics and Physics,
Vol.9 No.5,
May
6,
2021
ABSTRACT: In the present study, a homogeneous and anisotropic LRS Bianchi type I universe model is considered in f(R, T) theory of gravity. In order to find an exact solution of the field equations of the model, the model presented is based on a unique condition of periodically time varying deceleration parameter. The physical and geometrical characteristics of the universe model have been studied. It has been shown that the model has point-type singularity and all the cosmological parameters possess periodic time behavior. The model has a cyclic expansion history, for example, the model starts with the decelerating expansion, and later it transits to an accelerating phase of expansion and then goes to super-exponential phase of expansion in a period.