Gravitational Waves from Collapsing Domain Walls

TL;DR

This paper investigates gravitational wave production from metastable cosmic domain walls formed during early universe phase transitions, using lattice simulations to predict observable signals for upcoming gravitational wave detectors.

Contribution

It introduces a detailed simulation-based analysis of gravitational waves from collapsing metastable domain walls and predicts their detectability at high energy scales.

Findings

Gravitational waves from domain walls are potentially observable in future detectors.

Metastable domain walls at energy scales 10^10-10^12 GeV produce detectable signals.

Numerical simulations effectively extrapolate gravitational wave spectra from early universe phenomena.

Abstract

We study the production of gravitational waves from cosmic domain walls created during phase transition in the early universe. We investigate the process of formation and evolution of domain walls by running three dimensional lattice simulations. If we introduce an approximate discrete symmetry, walls become metastable and finally disappear. We calculate the spectrum of gravitational waves produced by collapsing metastable domain walls. Extrapolating the numerical results, we find the signal of gravitational waves produced by domain walls whose energy scale is around 10^10-10^12GeV will be observable in the next generation gravitational wave interferometers.