Incomplete optical shielding in cold atom traps: three-dimensional Landau-Zener theory
- 1 May 1997
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review A
- Vol. 55 (5) , 3772-3779
- https://doi.org/10.1103/physreva.55.3772
Abstract
Ultracold atom collisions in the presence of a linearly polarized blueshifted laser field are studied theoretically. An analytical solution is presented within the framework of the Landau-Zener approximation. The effect of incomplete shielding is mostly accounted for by incorporating the three-dimensional character of the collisions, using a partial-wave analysis with space degeneracy. A model of two electronic states, including effects of indistinguishability of the colliding atoms, is used. The model associates the incomplete shielding with a process involving two crossing points. The theory is applied to the case of metastable xenon traps, obtaining a fair agreement with the experimental data.Keywords
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