Consistency of a kind of general noncanonical warm inflation

TL;DR

This paper introduces a new framework for noncanonical warm inflation, deriving dynamical equations, slow roll conditions, and analyzing stability, demonstrating that inflation can occur more easily in this scenario.

Contribution

It presents a novel noncanonical warm inflation framework with new slow roll parameters and stability analysis, including a specific Dirac-Born-Infeld model.

Findings

Slow roll inflation can still occur in this scenario.

Slow roll conditions are easier to satisfy in noncanonical warm inflation.

A concrete Dirac-Born-Infeld warm inflation model is analyzed.

Abstract

The framework of a kind of noncanonical warm inflation is introduced, and the dynamical equations of this scenario are presented. We propose the slow roll approximations and give some redefining slow roll parameters in this scenario which remain dimensionless. Performing systemic stability analysis, we calculate the slow roll conditions to guarantee that slow roll approximations hold. The slow roll conditions suggest slow roll inflation in general noncanonical warm inflationary scenario can still exist, and in addition, the slow roll approximations are more easily to be satisfied. Then, a concrete Dirac-Born-Infeld warm inflationary model is studied.