Abstract
We present an Asymptotic Bound state Model (ABM), which is useful to
predict Feshbach resonances. The model utilizes asymptotic properties of
the interaction potentials to represent coupled molecular wavefunctions.
The bound states of this system give rise to Feshbach resonances,
localized at the magnetic fields of intersection of these bound states
with the scattering threshold. This model was very successful to assign
measured Feshbach resonances in an ultra cold mixture of ^6Li and ^40K
atomsootnotetextE. Wille, F.M. Spiegelhalder, G. Kerner, D. Naik,
A. Trenkwalder, G. Hendl, F. Schreck, R. Grimm, T.G. Tiecke, J.T.M.
Walraven, S.J.J.M.F. Kokkelmans, E. Tiesinga, P.S. Julienne,
arXiv:0711.2916. For this system, the accuracy of the determined
scattering lengths is comparable to full coupled channels results.
However, it was not possible to predict the width of the resonances. We
discuss how an incorporation of threshold effects will improve the
model, and we apply it to a mixture of ^87Rb and ^133Cs atoms, where
recently Feshbach resonances have been measured.
| Original language | English |
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| Publication status | Published - 1 May 2008 |
| Event | 39th Annual Meeting of the APS Division of Atomic, Molecular, and Optical Physics, DAMOP 2008 - Nittany Lion Inn, Penn State University, State College, United States Duration: 27 May 2008 → 31 May 2008 Conference number: 39 |
Conference
| Conference | 39th Annual Meeting of the APS Division of Atomic, Molecular, and Optical Physics, DAMOP 2008 |
|---|---|
| Abbreviated title | DAMOP 2008 |
| Country/Territory | United States |
| City | State College |
| Period | 27/05/08 → 31/05/08 |