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Collisional cooling of ultra-cold atom ensembles using Feshbach resonances

Published

Author(s)

Ludwig G. Mathey, Eite Tiesinga, Paul S. Julienne, Charles W. Clark

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 $^{40}$K, is given. We then improve upon this setup by using both a very sharp optical resonance and a very broad magnetic resonance and show that one can improve upon temperatures reached with current technologies.
Citation
Physical Review Letters
Volume
80

Keywords

cooling, Feshbach resonance, scattering, ultra cold atoms

Citation

Mathey, L. , Tiesinga, E. , Julienne, P. and Clark, C. (2009), Collisional cooling of ultra-cold atom ensembles using Feshbach resonances, Physical Review Letters, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=902264 (Accessed August 1, 2021)
Created September 8, 2009, Updated February 19, 2017