Feshbach loss spectroscopy in an ultracold Na<mml:mprescripts/><mml:none/>23−K<mml:mprescripts/><mml:none/>40 mixture

2017/09/05 by Minjie Zhu, Min-Jie Zhu, Huan Yang +9 · 1 citation
Physics and Astronomy · #Atomic and Subatomic Physics Research #Atomic physics #Cold Atom Physics and Bose-Einstein Condensates #Feshbach resonance #Molecule #Physics #Quantum mechanics #Quantum, superfluid, helium dynamics #Spectroscopy #cond-mat.quant-gas #physics.atom-ph

paper · pdf · doi:10.1103/physreva.96.062705

published as Phys. Rev. A 96, 062705 (2017) · 6 pages, 4 figures, 2 tables

arxiv created 2017/09/05 · openalex created_date 2017/09/15 · openalex publication_date 2017/12/15 · arxiv updated 2017/12/21 · openalex updated_date 2026/08/05

Abstract

We perform Feshbach spectroscopy in an ultracold mixture of ²³Na and ⁴⁰K 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.

Citations

• Geometric Scaling of Efimov States in aLi<mml:mprescripts/><mml:none/>6−Cs<mml:mprescripts/><mml:none/>133Mixture
• Feshbach resonances in ultracold gases
• Evidence for Efimov quantum states in an ultracold gas of caesium atoms

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• Preparation of a quasi-two-dimensional Bose mixture of ultracold Na <mml:mprescripts/> <mml:none/> 23 and Rb <mml:mprescripts/> <mml:none/> 87 atoms