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.

6 pages, 4 figures, 2 tables

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Cited by in corpus (2)

• Observation of interference between resonant and detuned STIRAP in the adiabatic creation of ${}^{23}$Na${}^{40}$K molecules
• Miscibility of Binary Bose-Einstein Condensates with $p$-wave Interaction