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arXiv 0903.0884cond-mat.other
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根据三个输入参数预测费什巴赫共振

Prediction of Feshbach resonances from three input parameters

Thomas M. Hanna, Eite Tiesinga, Paul S. Julienne

摘要:

利用多通道量子亏损理论的思想,建立了超冷碱金属原子气体中的费什巴赫共振模型。我们的模型只需要三个参数来描述相互作用-单重态和三重态散射长度,以及长程范德华系数-除了已知的原子性质。在不使用相互作用的任何进一步细节的情况下,我们的方法可以准确地预测共振的位置。它也可以用来找到单重态和三重态散射长度从测量的共振数据。我们应用我们的技术$^{6}$ Li- $^{40}$ K和$^{40}$ K- $^{87}$ Rb散射,获得良好的协议与实验结果,并与计算更密集的耦合通道技术。

英文摘要:

We have developed a model of Feshbach resonances in gases of ultracold alkali metal atoms using the ideas of multichannel quantum defect theory. Our model requires just three parameters describing the interactions - the singlet and triplet scattering lengths, and the long range van der Waals coefficient - in addition to known atomic properties. Without using any further details of the interactions, our approach can accurately predict the locations of resonances. It can also be used to find the singlet and triplet scattering lengths from measured resonance data. We apply our technique to $^{6}$Li--$^{40}$K and $^{40}$K--$^{87}$Rb scattering, obtaining good agreement with experimental results, and with the more computationally intensive coupled channels technique.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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