Laser-induced cooling of broadband heat reservoirs

TL;DR

This paper introduces a novel laser-assisted cooling method for broadband heat reservoirs, utilizing atomic collisions and fluorescence, which surpasses existing techniques in efficiency and versatility for various media.

Contribution

The paper presents a new laser cooling approach that can cool any broadband heat reservoir using red-detuned lasers, applicable to both gaseous and condensed media.

Findings

Higher cooling efficiency than existing methods

Achieves lower temperatures for broadband baths

Applicable to dense gaseous and condensed media

Abstract

We explore, theoretically and experimentally, a method for cooling a broadband heat reservoir, via its laser-assisted collisions with two-level atoms followed by their fluorescence. This method is shown to be advantageous compared to existing laser-cooling methods in terms of its cooling efficiency, the lowest attainable temperature for broadband baths and its versatility: it can cool down any heat reservoir, provided the laser is red-detuned from the atomic resonance. It is applicable to cooling down both dense gaseous and condensed media.