Bouncing cosmological model with general relativistic hydrodynamics in extended gravity

TL;DR

This paper proposes a bouncing cosmological model within extended gravity theories, incorporating relativistic hydrodynamics, analyzing its dynamics, energy conditions, and stability issues in an isotropic, homogeneous universe.

Contribution

It introduces a novel bouncing cosmological model in extended gravity with relativistic hydrodynamics, analyzing its energy conditions and stability.

Findings

Bounce occurs at t=0 with vanishing Hubble parameter.

Energy conditions analyzed, strong energy condition violated.

Model exhibits instability similar to other bouncing cosmologies.

Abstract

In this paper, in an extended theory of gravity, we have presented bouncing cosmological model at the backdrop of an isotropic, homogeneous space-time, in presence of general relativistic hydrodynamics (GRH). The scale factor has been chosen in such a manner that with appropriate normalization, the quintom bouncing scenario can be assessed. Accordingly, the bounce occurs at $t=0$ and the corresponding Hubble parameter vanishes at the bounce epoch. The equation of state (EoS) parameter and the energy conditions of the model have been analysed. The violation of strong energy condition further supports the behaviour of extended gravity. As the bouncing cosmology suffers with instability, this model also shows the similar behaviour.