English

Bouncing scenario in $f(R,T)$ gravity

General Relativity and Quantum Cosmology 2020-02-04 v3 High Energy Physics - Theory

Abstract

The present manuscript presents modeling of matter bounce in the framework of f(R,T)f(R,T) gravity where f(R,T)=R+2λTf(R,T) = R + 2 \lambda T. We start by defining a parametrization of scale factor which is non-vanishing. The geometrical parameters such as the Hubble parameter and deceleration parameter are derived, from which expressions of pressure, density and Equation of State (EoS) parameter and a qualitative understanding of the initial conditions of the universe at the bounce are ascertained. We found that the initial conditions of the universe are finite owing to the non-vanishing nature of the scale factor thus eliminates the initial singularity problem. Furthermore, we show the violation of energy conditions near the bouncing region and analyzed the stability of our model with respect to linear homogeneous perturbations in Friedmann-Lema\^tre-Robertson-Walker (FLRW) spacetime. We found that our model and hence matter bounce scenarios in general are highly unstable at the bounce in the framework of f(R,T)f(R,T) gravity but the perturbations decay out rapidly away from the bounce safeguarding its stability at late times.

Keywords

Cite

@article{arxiv.1907.08682,
  title  = {Bouncing scenario in $f(R,T)$ gravity},
  author = {Parbati Sahoo and S. Bhattacharjee and S. K. Tripathy and P. K. Sahoo},
  journal= {arXiv preprint arXiv:1907.08682},
  year   = {2020}
}

Comments

Accepted version at MPLA

R2 v1 2026-06-23T10:25:38.836Z