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arXiv · 1709.01260

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

Min-Jie Zhu·Huan Yang·Lan Liu·De-Chao Zhang·Ya-Xiong Liu·Jue Nan·Jun Rui·Bo Zhao·Jian-Wei Pan·Eberhard Tiemann
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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.

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Min-Jie Zhu, Huan Yang, Lan Liu, De-Chao Zhang, Ya-Xiong Liu, Jue Nan, Jun Rui, Bo Zhao, Jian-Wei Pan, Eberhard Tiemann. 2017-09-05. Feshbach Loss Spectroscopy in an Ultracold $^{23}$Na and $^{40}$K Mixture. https://doi.org/10.1103/physreva.96.062705

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