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arXiv 1101.4464cond-mat.quant-gas
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空间调制相互作用诱导的束缚态和散射共振

Spatially Modulated Interaction Induced Bound States and Scattering Resonances

Ran Qi, Hui Zhai

摘要:

研究了具有空间调制相互作用势的两体问题,采用双通道模型,其中通道间耦合由光学驻波提供,其强度在空间周期性调制.随着调制幅度的增加,将出现一系列束缚态。其中的一部分将导致发散的有效散射长度,定义通过相移的渐近行为的散射状态。我们还讨论了如何局部散射长度,定义通过散射状态的短程行为,调制空间在不同的制度。这些结果为冷原子工具箱中新的控制技术提供了理论指导,特别是对于非弹性损耗较小的碱土类原子。

英文摘要:

We study the two-body problem with a spatially modulated interaction potential using a two-channel model, in which the inter-channel coupling is provided by an optical standing wave and its strength modulates periodically in space. As the modulation amplitudes increases, there will appear a sequence of bound states. Part of them will cause divergence of the effective scattering length, defined through the phase shift in the asymptotic behavior of scattering states. We also discuss how the local scattering length, defined through short-range behavior of scattering states, modulates spatially in different regimes. These results provide a theoretical guideline for new control technique in cold atom toolbox, in particular, for alkali-earth-(like) atoms where the inelastic loss is small.

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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