Superradiance-assisted two-color Doppler cooling of molecules

TL;DR

This paper introduces a novel laser cooling method for molecules using superradiance to enhance two-photon transitions, achieving ultra-cold temperatures comparable to existing atomic cooling techniques.

Contribution

It presents a general vibrational-state based cooling scheme for molecules that leverages superradiance to improve cooling efficiency.

Findings

Simulations show temperatures comparable to existing atomic cooling methods.

Superradiance accelerates the two-photon transition process.

The scheme is broadly applicable to different molecular species.

Abstract

For experiments that require a quantum system to be in the ultra-cold regime, laser cooling is an essential tool. While techniques for laser cooling ions and neutral atoms have been refined and temperatures below the Doppler limit have been achieved, present-day techniques are limited to a small class of molecules. This paper proposes a general cooling scheme for molecules based on vibrational-state transitions. Superradiance is used to speed up the two-photon transition. Simulations of this scheme achieve temperatures comparable to those achieved by existing two-level schemes for neutral atoms and ions.