Magnetic field dependent interactions in an ultracold Li–Yb(3P2) mixture
Magnetic field dependent interactions in an ultracold Li–Yb(3P2) mixture
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超冷 Li-Yb(3P2) 混合物中磁场依赖性相互作用
DOI：
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发表时间：
2014
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通讯作者：
Subhadeep Gupta
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作者：
W. Dowd;Richard J Roy;R. Shrestha;A. Petrov;C. Makrides;S. Kotochigova;Subhadeep Gupta
磁Feshbach共振在从双碱混合物中生产超冷双原子分子方面取得了巨大成功，但迄今为止在碱和碱土类原子的混合物中尚未观察到。超冷原子系统的非弹性碰撞性质在这种共振附近表现出共振行为，提供检测特征。利用原子损失谱研究了基态碱金属6Li和激发电子亚稳态类碱土金属174 Yb的超冷混合物中磁场依赖的非弹性效应（3 P2，mJ = − 1？> ).我们观察到的物种间的非弹性两体速率系数的变化由近一个数量级超过100-520 G的磁场范围。通过比较从头计算，我们将我们的观察到种间Feshbach共振所产生的各向异性相互作用在这个新的碰撞系统。
Magnetic Feshbach resonances have allowed great success in the production of ultracold diatomic molecules from bi-alkali mixtures, but have so far eluded observation in mixtures of alkali and alkaline-earth-like atoms. Inelastic collisional properties of ultracold atomic systems exhibit resonant behavior in the vicinity of such resonances, providing a detection signature. We study magnetic field dependent inelastic effects via atom loss spectroscopy in an ultracold heteronuclear mixture of alkali 6Li in the ground state and alkaline-earth-like 174Yb in an excited electronic metastable state (3P2, m J = − 1 ?> ). We observe a variation of the interspecies inelastic two-body rate coefficient by nearly one order of magnitude over a 100–520 G magnetic field range. By comparing to ab initio calculations we link our observations to interspecies Feshbach resonances arising from anisotropic interactions in this novel collisional system.