Enhanced dark-state sideband cooling in trapped atoms via photon-mediated dipole-dipole interactions

TL;DR

This paper demonstrates enhanced dark-state sideband cooling in trapped atoms by leveraging photon-mediated dipole-dipole interactions, surpassing single-atom cooling limits and advancing quantum technology applications.

Contribution

It introduces a method for improved cooling using collective interactions at magic interparticle distances, with potential for scalable quantum register operations.

Findings

Outperforms single-atom cooling limits.

Identifies multiple magic spacings for optimal cooling.

Predicts moderate improvements with increasing atom number.

Abstract

Resolved sideband cooling provides a crucial step in subrecoil cooling the trapped atoms toward their motional ground state, which is essential in atom-based quantum technologies. Here we present an enhanced dark-state sideband cooling in trapped atoms utilizing photon-mediated dipole-dipole interactions among them. By placing the atoms at the magic interparticle distances, we manifest an outperformed cooling behavior in the target atom, which surpasses the limit that a single atom permits. We further investigate various atomic configurations in a multiatom setup with a laser detuning and different light polarization angles, where multiple magic spacings can be identified and a moderate improvement in cooling performance is predicted as the number of atoms increases. Our results provide insights to subrecoil cooling of atoms with collective and light-induced long-range dipole-dipole interactions, and pave the way toward implementing genuine quantum operations in multiple quantum registers.