Quantum gravity

Physics

Gravitation

Stress–energy tensor

Mathematics

Mathematical physics

f(R) gravity

Composite material

Dark energy

Materials science

Range (aeronautics)

Geometry

Cosmology

Deceleration parameter

Astrophysics

Exact solutions in general relativity

Quantum mechanics

Scalar (mathematics)

Classical mechanics

Quantum

Modern Physics Letters A

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 behavior 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 behavior of the EOS parameter are studied. We have also explored the obvious violation of energy–momentum conservation in f(R, T) gravity. The periodic behavior of energy conditions for the model are also discussed with a wide range of the free parameters.

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