Vacuum state perturbed by an oscillon: composite configurations in $\phi^4$ model

TL;DR

This paper investigates how a vacuum state perturbed by an oscillon in a  scalar field model evolves, revealing new composite solutions and resonant structures that resemble kink-antikink scattering, enhancing understanding of oscillon decay mechanisms.

Contribution

It introduces the formation of composite solutions from highly excited oscillons and maps their dynamics, providing new insights into oscillon decay processes in  models.

Findings

New composite solutions with multiple antikink-kink pairs

Resonant structures similar to kink-antikink scattering

Oscillon decay reproduces kink-antikink collision patterns

Abstract

We examine the evolution of a vacuum configuration when perturbed by an oscillon. We consider the $\phi^4$ scenario with a single scalar field only. For highly excited oscillons, we find that new composite solutions appear. They are formed by multiple antikink-kink pairs and a centered reminiscent oscillon. The overall process gives rise to a resonant structure whose pattern resembles that of a genuine kink-antikink scattering. We then approximate the initial oscillon by a lumplike profile constructed as a kink-antikink pair. We map the numerical results previously obtained. The developments proposed here may contribute to the understanding of the mechanism through which an oscillon decay reproduces the structure typically related to a kink-antikink collision.