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arXiv 1706.09458cond-mat.quant-gasnucl-th
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正散射长度和有限温度下异质三体系统的Efimov效应

The Efimov effect for heteronuclear three-body systems at positive scattering length and finite temperature

Samuel B. Emmons, Daekyoung Kang, Bijaya Acharya, Lucas Platter

摘要:

本文研究了在有限温度下,在具有大的正的种间散射长度的超冷原子气体的异质混合物中,三原子散射成一个原子和双原子分子的复合过程。我们计算的温度依赖性的三体复合率提取通用的尺度函数参数化的散射矩阵的能量依赖性。我们比较我们的结果与实验数据的40 K-87 Rb的混合物,并作出预测6Li-87 Rb。我们发现,从较高的分波通道的贡献显着影响总速率,特别是大的质量不平衡的系统中,甚至可以抹杀与Efimov效应相关的重组最小值。

英文摘要:

We study the recombination process of three atoms scattering into an atom and diatomic molecule in heteronuclear mixtures of ultracold atomic gases with large and positive interspecies scattering length at finite temperature. We calculate the temperature dependence of the three-body recombination rates by extracting universal scaling functions that parametrize the energy dependence of the scattering matrix. We compare our results to experimental data for the 40K-87Rb mixture and make a prediction for 6Li-87Rb. We find that contributions from higher partial wave channels significantly impact the total rate and, in systems with particularly large mass imbalance, can even obliterate the recombination minima associated with the Efimov effect.

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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