Feshbach resonances in Na-23 + K-39 mixtures and refined molecular potentials for the NaK molecule

Year: 2019

Authors: Hartmann T., Schulze T.A., Voges, K.K., Gersema P., Gempel M.W., Tiemann E., Zenesini A., Ospelkaus S.

Autors Affiliation: Leibniz Univ Hannover, Inst Quantenopt, D-30167 Hannover, Germany

Abstract: We present a detailed study of interspecies Feshbach resonances of the bosonic Na-23 + K-39 mixture for magnetic fields up to 750 G in various collision channels. A total of 14 Feshbach resonances are reported, as well as four zero crossings of the scattering length and three inelastic two-body loss features. We use the observed magnetic-field locations of the resonant features together with the known data on Na-23 + K-40 to refine the singlet and triplet ground-state potentials of NaK and achieve a consistent description of Feshbach resonances for both the Bose-Bose mixture of Na-23 + K-39 and the Bose-Fermi mixture of Na-23 + K-40. We also discuss the influence of the interplay between inelastic two-body and three-body processes on the observation of a Feshbach resonance.


Volume: 99(3)      Pages from: 032711-1  to: 032711-7

KeyWords: Feshbach resonances, Cold Atoms, Mixtures
DOI: 10.1103/PhysRevA.99.032711