Strong primordial inhomogeneities induced by axion-like scalar field

TL;DR

This paper explores how axion-like particles can create primordial inhomogeneities in space-time near domain walls, using a first-step approximation and discussing the thin-shell approximation's relevance.

Contribution

It introduces a novel analysis of space-time behavior around axion-induced domain walls with a focus on approximation methods.

Findings

Initial approximation of space-time near axion domain walls

Assessment of thin-shell approximation applicability

Insights into primordial inhomogeneities caused by ALPs

Abstract

Our goal is to consider Axion-like particle (ALP) model to investigate the behaviour of space-time in the vicinity of the domain wall, induced by axion-like field. Here we present first-step approximation in our analysis and discuss the applicability of thin-shell approximation.