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arXiv 0710.0733physics.atom-phcond-mat.other
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通过电场和磁场完全控制超冷相互作用

Total control over ultracold interactions via electric and magnetic fields

Bout Marcelis, Boudewijn Verhaar, Servaas Kokkelmans

摘要:

散射长度通常用于表征超冷原子相互作用的强度,因为它是散射相移的低能扩展中的主要参数。它的值可以通过磁场通过使用费什巴赫共振来修改。然而,有效射程项,这是相移展开中的第二个参数,决定了共振的宽度,并产生了超冷气体的重要性质。仅使用磁场无法独立控制该参数。我们证明,磁场和电场的组合可以用来获得独立的控制这两个参数,从而导致完全控制弹性超冷相互作用。

英文摘要:

The scattering length is commonly used to characterize the strength of ultracold atomic interactions, since it is the leading parameter in the low-energy expansion of the scattering phase shift. Its value can be modified via a magnetic field, by using a Feshbach resonance. However, the effective range term, which is the second parameter in the phase shift expansion, determines the width of the resonance and gives rise to important properties of ultracold gases. Independent control over this parameter is not possible by using a magnetic field only. We demonstrate that a combination of magnetic and electric fields can be used to get independent control over both parameters, which leads to full control over elastic ultracold interactions.

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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