Predicting correlations in superradiant emission from a cascaded quantum system
Abstract
In recent experiments, a novel type of cascaded quantum system has been realized using nanofiber-coupled cold atomic ensembles. This setup has enabled the study of superradiant decay of highly excited collective spin states of up to a thousand atoms, featuring unidirectional coupling mediated by the waveguide mode. The complexity arising from the large, multi-excited ensemble and the cascaded interactions between atoms makes conventional simulation methods unsuitable for predicting the correlations of superradiant emission beyond the first order. To address this challenge, we developed a new simulation technique based on the truncated Wigner approximation for spins. Our stochastic simulation tool can predict the second-order quantum coherence function, , along with other correlators of the light field emitted by a strongly excited cascaded system of two-level emitters. This approach thus provides an effective and scalable method for analyzing cascaded quantum systems with large numbers of particles.
Cite
@article{arxiv.2407.02154,
title = {Predicting correlations in superradiant emission from a cascaded quantum system},
author = {Felix Tebbenjohanns and Christopher D. Mink and Constanze Bach and Arno Rauschenbeutel and Michael Fleischhauer},
journal= {arXiv preprint arXiv:2407.02154},
year = {2024}
}