# Quantum effects in the cooperative scattering of light by atomic clouds

## TL;DR

This paper introduces a new simulation method to explore quantum cooperative effects in light scattering by atomic clouds, revealing unique spectral signatures like additional sidebands and asymmetries in the fluorescence spectrum.

## Contribution

The study presents a novel simulation technique enabling the investigation of quantum effects in large atomic clouds' light scattering dynamics.

## Key findings

- Observation of additional sidebands at twice the classical Mollow sidebands
- Detection of asymmetry in the Mollow triplet
- Scaling behavior of quantum signatures with atom number

## Abstract

Scattering of classical light by atomic clouds induces photon-mediated effective long-range interactions between the atoms and leads to cooperative effects even at low atomic densities. We introduce a novel simulation technique that allows us to investigate the quantum regime of the dynamics of large clouds of atoms. We show that the fluorescence spectrum of the cloud can be used to probe genuine quantum cooperative effects. Signatures of these effects are the occurrence, and the scaling behavior, of additional sidebands at twice the frequency of the classical Mollow sidebands, as well as an asymmetry of the Mollow triplet.