Observation of Feshbach resonances between alkali and closed-shell atoms
Observation of Feshbach resonances between alkali and closed-shell atoms
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DOI：
10.1038/s41567-018-0169-x
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发表时间：
2017-10
期刊：
影响因子：
19.6
通讯作者：
V. Barbé;A. Ciamei;B. Pasquiou;Lukas Reichsöllner;F. Schreck;P. Żuchowski;J. Hutson
中科院分区：
文献类型：
--
作者：
V. Barbé;A. Ciamei;B. Pasquiou;Lukas Reichsöllner;F. Schreck;P. Żuchowski;J. Hutson
磁性费什巴赫共振可以控制超冷原子之间的相互作用。它们是研究少体和多体物理的无价工具，可以用来将成对的原子转化为分子，方法是在共振时施加磁场。由碱原子对形成的分子被转移到低激发态，产生偶极量子气体。人们对由碱原子和闭壳层原子如基态锶或Yb形成的分子很感兴趣。这种分子既有强大的电偶极子，又有电子自旋；它们将为设计量子多体系统和测试基本对称性开辟新的可能性。关键的第一步是观察相应原子混合物中的费什巴赫共振。理论上已经预测到了非常窄的共振，但到目前为止还没有观察到。在这里，我们给出了碱原子Rb与基态Sr相互作用的这类磁性Feshbach共振的观测结果。
Magnetic Feshbach resonances allow control of the interactions between ultracold atoms. They are an invaluable tool in studies of few-body and many-body physics,, and can be used to convert pairs of atoms into molecules,by ramping an applied magnetic field across a resonance. Molecules formed from pairs of alkali atoms have been transferred to low-lying states, producing dipolar quantum gases. There is great interest in making molecules formed from an alkali atom and a closed-shell atom such as ground-state Sr or Yb. Such molecules have both a strong electric dipole and an electron spin; they will open up new possibilities for designing quantum many-body systems,, and for tests of fundamental symmetries. The crucial first step is to observe Feshbach resonances in the corresponding atomic mixtures. Very narrow resonances have been predicted theoretically,,, but until now have eluded observation. Here we present the observation of magnetic Feshbach resonances of this type, for an alkali atom, Rb, interacting with ground-state Sr.