Feshbach loss spectroscopy in an ultracold Na 23 − K 40 mixture

作者：Minjie Zhu, Huan Yang, Lan Liu, De-Chao Zhang, Ya-Xiong Liu, Jue Nan, Jun Rui, Bo Zhao, Jian-Wei Pan, E. Tiemann · 发表于：Physical Review A · 年份：2017 · DOI：10.1103/physreva.96.062705 · 被引用次数：21 · 研究领域：Cold Atom Physics and Bose-Einstein Condensates、Quantum, superfluid, helium dynamics、Atomic and Subatomic Physics Research

We perform Feshbach spectroscopy in an ultracold mixture of $^{23}\mathrm{Na}$ and $^{40}\mathrm{K}$ with different spin-state combinations. We observed 24 new interspecies Feshbach resonances at magnetic fields 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 predictions based on the previous model potential. Taking into account these 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.