Progress applying density of states for gravitational waves

TL;DR

This paper discusses using lattice field theory and the LLR density of states algorithm to predict gravitational wave signals from early Universe phase transitions in dark matter models.

Contribution

It introduces a novel application of the LLR density of states algorithm to study first-order confinement transitions in SU(N) Yang--Mills theories for gravitational wave predictions.

Findings

Preliminary results on transition properties using lattice simulations.

Potential for future gravitational wave detection based on these models.

Advancement in computational methods for early Universe phase transitions.

Abstract

Many models of composite dark matter feature a first-order confinement transition in the early Universe, which would produce a stochastic background of gravitational waves that will be searched for by future gravitational-wave observatories. We present work in progress using lattice field theory to predict the properties of such first-order transitions. Targeting SU(N) Yang--Mills theories, this work employs the Logarithmic Linear Relaxation (LLR) density of states algorithm to avoid super-critical slowing down at the transition.