Reheating in 3-form inflation

TL;DR

This paper explores reheating in 3-form inflation, demonstrating that coupling to matter fields is stable and leads to more efficient particle production than standard scalar inflation.

Contribution

It introduces a coupled 3-form inflation model, analyzing its stability and showing enhanced reheating efficiency compared to traditional scalar inflation models.

Findings

Stable coupling without ghosts or instabilities

More efficient particle production during reheating

Higher reheating temperature than standard models

Abstract

We consider the 3-form field, which has been considered as a candidate for realizing inflation, coupled to a scalar field which models the relativistic matter particles produced during the reheating epoch. We have investigated the stability conditions for this theory and found that introducing such a coupling does not lead to any ghosts or Laplacian instabilities. We have also investigated the reheating temperature and the production of particles due to parametric resonances. We have found that this process is more efficient in this theory compared to the result of the standard-scalar-field inflationary scenario.