Time-resolved spectroscopy of noise-driven collective states of light
Optics
2025-08-20 v1
Abstract
We study a collective liquid state of light in a fast-gain laser. Controlled temporal noise on the cavity modulation creates a fluctuating linear potential along the synthetic frequency lattice of the cavity modes. We identify three regimes of lattice occupation as noise increases: an extended distribution, a Gaussian envelope, and exponential localization. Time-resolved spectroscopy on single realizations of noise reveals distinct dynamics in the latter two: transport persists in the Gaussian regime, modulated by the fluctuating potential, but is fully suppressed at all times in the localized regime. Averaging over many noise realizations shows that noise reduces the transport speed and confirms ergodicity of the system.
Keywords
Cite
@article{arxiv.2508.13832,
title = {Time-resolved spectroscopy of noise-driven collective states of light},
author = {Diego Piciocchi and Ina Heckelmann and Alexander Dikopoltsev and Michael Schreiber and Mathieu Bertrand and Mattias Beck and Christian Jirauschek and Oded Zilberberg and Jérôme Faist},
journal= {arXiv preprint arXiv:2508.13832},
year = {2025}
}