Preheating in Bubble Collisions

TL;DR

This paper investigates how bubble collisions in a metastable landscape lead to explosive particle production, making the collisions highly inelastic and impacting cosmological models.

Contribution

It demonstrates that oscillating fields during bubble collisions cause efficient energy release through particle production, a novel insight into bubble collision dynamics.

Findings

Bubble collisions are highly inelastic due to explosive particle production.

Oscillating fields at collision regions facilitate energy release.

Implications for cosmological models with metastable minima.

Abstract

In a landscape with metastable minima, the bubbles will inevitably nucleate. We show that during the bubbles collide, due to the dramatically oscillating of the field at the collision region, the energy deposited in the bubble walls can be efficiently released by the explosive production of the particles. In this sense, the collision of bubbles is actually highly inelastic. The cosmological implications of this result are discussed.