Collisional cooling of ultra-cold atom ensembles using Feshbach resonances
Other Condensed Matter
2013-05-29 v1
Abstract
We propose a new type of cooling mechanism for ultra-cold fermionic atom ensembles, which capitalizes on the energy dependence of inelastic collisions in the presence of a Feshbach resonance. We first discuss the case of a single magnetic resonance, and find that the final temperature and the cooling rate is limited by the width of the resonance. A concrete example, based on a p-wave resonance of K, is given. We then improve upon this setup by using both a very sharp optical or radio-frequency induced resonance and a very broad magnetic resonance and show that one can improve upon temperatures reached with current technologies.
Keywords
Cite
@article{arxiv.0903.2568,
title = {Collisional cooling of ultra-cold atom ensembles using Feshbach resonances},
author = {L. Mathey and Eite Tiesinga and Paul S. Julienne and Charles W. Clark},
journal= {arXiv preprint arXiv:0903.2568},
year = {2013}
}
Comments
4 pages, 3 figures