Warm constant-roll inflation in brane-world cosmology

TL;DR

This paper explores a warm constant-roll inflation model within brane-world cosmology, deriving analytical solutions and analyzing perturbations, with results aligning well with observational data.

Contribution

It introduces a novel warm inflation model in brane-world cosmology with analytical solutions and perturbation analysis, extending previous inflationary frameworks.

Findings

Scalar spectral index consistent with observations

Tensor-to-scalar ratio within observational bounds

Analytical solutions for the inflationary dynamics

Abstract

In this article we study a constant-roll inflationary model in the context of brane-world cosmology caused by a quintessence scalar field for warm inflation with a constant dissipative parameter Q =$\Gamma$/3H. We determine the analytical solution for the Friedman equation coupled to the equation of motion of the scaler field. The evolution of the primordial scalar and tensor perturbations is also studied using the modified Langevin equation. To check the viability of the model we use numerical approaches and plot some figures. Our results for the scalar spectral index and the tensor to scaler ratio show good consistency with observations.