Systematic assignment of Feshbach resonances via an asymptotic bound state model

Research output: Contribution to conferencePaperAcademic

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 languageEnglish
Publication statusPublished - 1 May 2008
Event39th 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 200831 May 2008
Conference number: 39

Conference

Conference39th Annual Meeting of the APS Division of Atomic, Molecular, and Optical Physics (DAMOP 2008)
Abbreviated titleDAMOP 2008
CountryUnited States
CityState College
Period27/05/0831/05/08

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