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arXiv 1302.0281cond-mat.quant-gas
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费什巴赫共振附近的有限程修正及其在Efimov效应中的作用

Finite range corrections near a Feshbach resonance and their role in the Efimov effect

P. Dyke, S. E. Pollack, R. G. Hulet

摘要:

我们通过调制磁场,将自由原子关联到玻色-爱因斯坦凝聚体中,测量了$^7$ Li Feshbach分子的结合能。我们从这些测量中提取散射长度,使用几种不同的方法校正非普遍的短程效应。我们发现,场相关的有效范围修正同意与数据。通过更精确地确定散射长度与场的关系,我们重新分析了Efimov效应\cite{PollackSci09}产生的原子损失特征的位置,并研究了对通用理论的有效范围修正。

英文摘要:

We have measured the binding energy of $^7$Li Feshbach molecules deep into the non-universal regime by associating free atoms in a Bose-Einstein condensate by modulating the magnetic field. We extract the scattering length from these measurements, correcting for non-universal short-range effects using several different methods. We find that field-dependent effective range corrections agree well with the data. With this more precise determination of the scattering length vs. field we reanalyze our previous data on the location of atom loss features produced by the Efimov effect \cite{PollackSci09} and investigate effective range corrections to universal theory.

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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