Feshbach Loss Spectroscopy in an Ultracold ${}^{23}$Na and ${}^{40}$K Mixture

Abstract

We perform Feshbach spectroscopy in an ultracold mixture of ${}^{23}$Na and ${}^{40}$K with different spin-state combinations. We have observed 24 new interspecies Feshbach resonances at magnetic field up to 350 G. A full coupled-channel calculation is performed to assign these resonances. Among them, 12 resonances are identified as d-wave Feshbach resonances. These d-wave Feshbach resonances are about 5 G systematically smaller than the predications based on previous model potential. Taking into account these new experimental results, we improve the Born-Oppenheimer potentials between Na and K, and achieve good agreement between the theory and experiment for all the observed Feshbach resonances.

arXiv comment6 pages, 4 figures, 2 tables

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Cited by in corpus (11)

• Observation of magnetically tunable Feshbach resonances in ultracold ${}^{23}$Na${}^{40}$K+${}^{40}$K collisions
• Bipolarons in a Bose-Einstein Condensate
• Feshbach spectroscopy and dual-species Bose-Einstein condensation of ${}^{23}\mathrm{Na}-$${}^{39}\mathrm{K}$ mixtures
• Observation of interference between resonant and detuned STIRAP in the adiabatic creation of ${}^{23}$Na${}^{40}$K molecules
• Complexes formed in collisions between ultracold alkali-metal diatomic molecules and atoms
• Feshbach resonances in ${}^{23}\mathrm{Na}+$${}^{39}\mathrm{K}$ mixtures and refined molecular potentials for the NaK molecule
• Strongly interacting Bose-Fermi mixture: mediated interaction, phase diagram and sound propagation
• Inelastic collisions in radiofrequency-dressed mixtures of ultracold atoms
• Miscibility of Binary Bose-Einstein Condensates with $p$-wave Interaction
• Formation of ultracold ${}^{39}$K${}^{133}$Cs Feshbach molecules
• Preparation of quasi-two-dimensional Bose mixture of ultracold ${}^{23}$Na and ${}^{87}$Rb atoms