Note on Reheating in G-inflation

TL;DR

This paper investigates particle production at the end of G-inflation, demonstrating that coupling to the inflaton field can lead to more efficient matter particle creation than gravitational effects alone, despite the absence of inflaton oscillations.

Contribution

It reveals that matter particle production can be enhanced in G-inflation models through inflaton coupling, even without inflaton oscillations or parametric resonance.

Findings

Particle production can be more efficient than gravitational Parker production.

No inflaton oscillations are necessary for matter creation.

Coupling to the inflaton field enhances particle production.

Abstract

We study particle production at the end of inflation in kinetically driven G-inflation model and show that, in spite of the fact that there are no inflaton oscillations and hence no parametric resonance instabilities, the production of matter particles due to a coupling to the evolving inflaton field can be more efficient than pure gravitational Parker particle production.