# Stochastic Gravitational-Wave Background from Axion-Monodromy Oscillons in String Theory During Preheating

## TL;DR

This paper explores how axion monodromy inflation in string theory during preheating can generate detectable stochastic gravitational-wave backgrounds, providing a new way to probe string compactifications.

## Contribution

It demonstrates, via lattice simulations, that significant gravitational waves are produced during preheating in axion monodromy models with specific potentials, a novel connection between string theory and gravitational wave observations.

## Key findings

- Single-peak stochastic gravitational-wave backgrounds are generated during preheating.
- Significant gravitational waves occur for linear and cuspy potentials in axion monodromy.
- Potential to explore string compactifications through gravitational wave detection.

## Abstract

Axion monodromy is a generic phenomenon in string compactifications. We investigate the production of gravitational-wave background from axion monodromy inflation during preheating. By performing lattice simulations using pseudo-spectral methods, we find that significant single-peak stochastic gravitational-wave backgrounds are generated during preheating for asymptotic linear $|\phi|$ and $\phi^{2/3}$ potentials in axion monodromy inflation and cuspy potentials. This may allow us to explore string compactifications through gravitational waves.