A periodic varying deceleration parameter in $f(R,T)$ gravity

Abstract

The phenomenon of accelerated expansion of the present universe and a cosmic transit aspect is explored in the framework of a modified gravity theory known as $f(R,T)$ gravity (where $R$ is the Ricci scalar and $T$ is the trace of the energy momentum tensor of the matter content). The cosmic transit phenomenon signifies a signature flipping behaviour of the deceleration parameter. We employ a periodic varying deceleration parameter and obtained the exact solution of field equations. The dynamical features of the model including the oscillatory behaviour of the EOS parameter are studied. We have also explored the obvious violation of energy momentum conservation in $f(R,T)$ gravity. The periodic behaviour of energy conditions for the model are also discussed with a wide range of the free parameters.

19 pages, 14 figures, Accepted version in MPLA

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• f(R,T) gravity
• Dark torsion as the cosmic speed-up
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• Extra force in $f(R)$ modified theories of gravity
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• Cosmographic bounds on the cosmological deceleration-acceleration transition redshift in $f(\mathcal{R})$ gravity
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• The oscillating dark energy: future singularity and coincidence problem
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• Examining the evidence for dynamical dark energy
• Anisotropic cosmological models in $f(R,T)$ gravity with variable deceleration parameter

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• Comprehensive Analysis of a Non-Singular Bounce in $f(R,T)$ Gravitation
• Bouncing scenario in $f(R,T)$ gravity
• Modelling Casimir Wormholes in Extended Gravity
• Viability of Bianchi type V Universe in $f(R,T)=f_1(R)+f_2(R)f_3(T)$ gravity
• Bouncing Models in an Extended Gravity Theory
• Cosmographic analysis of a closed bouncing universe with the varying cosmological constant in $f(R,T)$ gravity
• Phantom fluid wormhole in $f(R,T)$ gravity
• A Cyclic Universe With Varying Cosmological Constant in $f(R,T)$ gravity
• Compatibility between the scalar field models of tachyon, $k$-essence and quintessence in $f(R,T)$ gravity
• Periodic cosmic evolution in $f(Q)$ gravity formalism
• Constraining f(R,T) Gravity From The Dark Energy Density Parameter ${\Omega }_{\Lambda }$
• An FLRW interacting dark energy model of the Universe
• Accelerating model of flat universe in $f(R,T)$ gravity
• Quadratic integrals of a multi-scalar cosmological model
• Role of a periodic varying deceleration parameter in Particle creation with higher dimensional FLRW Universe
• Reexamining RHDE Models in FRW Universe with two IR cut-off with redshift parametrization
• Causal cosmology with braneworld gravity including Gauss Bonnet coupling