| Author(s): |
Ludwig G. Mathey; Eite Tiesinga; Paul S. Julienne; Charles W. Clark; |
| Title: |
Collisional cooling of ultra-cold atom ensembles using Feshbach resonances |
| Published: |
September 08, 2009 |
| 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 |
| Pages: |
4 pp. |
| Keywords: |
cooling; Feshbach resonance; scattering; ultra cold atoms |
| Research Areas: |
Atomic Physics |
| PDF version: |
 Click here to retrieve PDF version of paper (232KB) |
