Bouncing cosmology in modified gravity with higher-order curvature terms

Abstract

A bouncing scenario of a flat homogeneous and isotropic universe is explored by using the reconstruction technique for the power-law parametrization of the Hubble parameter in a modified gravity theory with higher-order curvature and trace of the energy-momentum tensor terms. It is demonstrated that bouncing criteria are satisfied so that the cosmological initial singularity can be avoided. In addition, it is shown that the equation of state parameter crosses the line of the phantom divide. In the present scenario, the universe is filled with perfect fluid around the bouncing point, in which the universe becomes highly unstable and a big bounce can be realized. Furthermore, it is found that extremal acceleration occurs at the bouncing point.

arXiv comment14 pages, 13 figures

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• A non-singular bouncing cosmology in $f(R,T)$ gravity
• $f(R,T)$ Gravity Bouncing Universe with Cosmological Parameters
• Bouncing cosmological models in $f(R,L_m)$ gravity
• A constrained cosmological model in $f(R,L_m)$ gravity
• New parametrization of the dark-energy equation of state with a single parameter
• Observational Constraints and Cosmographic Analysis of $f(T,T_G)$ Gravity and Cosmology
• Curvature dominance DE-model in $f(R)$-gravity
• Reconstruction of the singularity-free $f(\mathcal{R})$ gravity via Raychaudhuri equations
• A short review on Quintom dark energy theory
• Exploring the Universe Expansion History with f(R,T) Gravity: Constraints on Cosmological Parameters
• Gravitational Collapse of an Inhomogeneous Fluid in Rastall Theory
• Comparison of Quasinormal Modes of Black Holes in $f(\mathbb{T})$ and $f(\mathbb{Q})$ Gravity
• Singularity Avoidance in Gravitational Collapse of an Inhomogeneous Fluid in Rastall Gravity