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arXiv 0812.3501cond-mat.other
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无序势阱中费米气体的偶极振荡:阻尼和局域化

Dipole Oscillations of a Fermi Gas in a Disordered Trap: Damping and Localization

Luca Pezzé, Ben Hambrecht, Laurent Sanchez-Palencia

摘要:

本文从理论上研究了无序势阱中理想费米气体的偶极振荡。我们发现,即使是弱无序诱导强阻尼的振荡,我们确定了一个金属-绝缘体交叉。对于非常弱的无序,我们表明,阻尼的结果从弱随机扰动的能谱的退相效应。对于增加的无序,我们表明,费米气体跨越到一个绝缘制度的特点是强阻尼由于局域态的扩散。

英文摘要:

We theoretically study the dipole oscillations of an ideal Fermi gas in a disordered trap. We show that even weak disorder induces strong damping of the oscillations and we identify a metal-insulator crossover. For very weak disorder, we show that damping results from a dephasing effect related to weak random perturbations of the energy spectrum. For increasing disorder, we show that the Fermi gas crosses over to an insulating regime characterized by strong-damping due to the proliferation of localized states.

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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