论文标题
Efimov的共振位置靠近狭窄的Feshbach共振，$^6 $ li-$^{133} $ CS混合物
Efimov resonance position near a narrow Feshbach resonance in $^6$Li-$^{133}$Cs mixture
论文作者
论文摘要
在狭窄的Feshbach共振的附近，Efimov特征的特征是共振的特征，而不是原子间电位的范德华长度。尽管到目前为止，这一理论预测已经建立了良好，但仍然缺乏实验性确认。在这里，我们应用了最近开发的三通道模型[Yudkin和Khaykovich，Phys。 Rev. A 103，063303（2021）]到在质量状态损坏的$^6 $ li-$^{133} $ cs混合物中获得的实验结果，在迄今为止探索的最狭窄共振的附近，[Johansen at。 al。纳特。物理。 13，731（2017）]。我们确认，观察到的Efimov共振的位置主要取决于共振物理，而原子间潜能的范德华尾部的影响很小。我们表明，共振位置受到另一种Feshbach共振的存在很大，从而显着改变了狭窄的共振位置的有效背景散射长度。
In the vicinity of a narrow Feshbach resonances Efimov features are expected to be characterized by the resonance's properties rather than the van der Waals length of the interatomic potential. Although this theoretical prediction is well-established by now, it still lacks experimental confirmation. Here, we apply our recently developed three-channel model [Yudkin and Khaykovich, Phys. Rev. A 103, 063303 (2021)] to the experimental result obtained in a mass-imbalanced $^6$Li-$^{133}$Cs mixture in the vicinity of the narrowest resonance explored to date [Johansen at. al. Nat. Phys. 13, 731 (2017)]. We confirm that the observed position of the Efimov resonance is dictated mainly by the resonance physics while the influence of the van der Waals tail of the interatomic potential is minor. We show that the resonance position is strongly influenced by the presence of another Feshbach resonance which significantly alters the effective background scattering length at the narrow resonance position.
