Warm Inflation in $f(R,T)$ gravity

TL;DR

This paper investigates warm inflation within $f(R,T)$ gravity, deriving modified equations, analyzing perturbations, and showing that certain potentials can be compatible with observational data under this framework.

Contribution

It introduces a novel analysis of warm inflation in $f(R,T)$ gravity, deriving modified field equations and demonstrating the viability of specific potentials with observational constraints.

Findings

Both potentials can be revived in $f(R,T)$ gravity with suitable parameters.

The potentials are consistent with Planck 2018 bounds at various energy scales.

The model accommodates constant and variable dissipation factors.

Abstract

In this work, we explored warm inflation in the background of $f(R,T)$ gravity in the strong dissipation regime. Considering scalar field for FLRW universe, we derived modified field equations. We then deduced slow-roll parameters under slow-roll approximations followed by power spectrum for scalar and tensor perturbations and their corresponding spectral indices. We have considered Chaotic and Natural potentials and estimated scalar spectral index and tensor-to-scalar ratio for constant as well as variable dissipation factor $\Gamma$. We found that both the rejected potentials can be revived under the context of $f(R,T)$ gravity with suitable choice of the model parameters. Further, it is seen that within the warm inflationary scenario both the potentials are consistent with Planck 2018 bounds at the Planckian and sub Planckian energy scales.