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arXiv 1307.7175cond-mat.quant-gas
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变尺度紊乱的三维安德森局域化

Three-Dimensional Anderson Localization in Variable Scale Disorder

W. R. McGehee, S. S. Kondov, W. Xu, J. J. Zirbel, B. DeMarco

摘要:

本文研究了变尺度无序对非相互作用超冷原子气体三维安德森局域化的影响。一个自旋极化的费米子原子气体局域化,允许它在一个光学散斑势扩展。使用突然淬火的本地化的密度分布,我们验证的密度分布是代表底层的单粒子本地化状态。通过调节散斑聚焦透镜的孔径,无序势相关长度的几何平均值可以改变四倍。我们观察到,本地化气体的均方根大小增加近似线性的散斑相关长度,定性协议与弱散射理论预测的缩放。

英文摘要:

We report on the impact of variable-scale disorder on 3D Anderson localization of a non-interacting ultracold atomic gas. A spin-polarized gas of fermionic atoms is localized by allowing it to expand in an optical speckle potential. Using a sudden quench of the localized density distribution, we verify that the density profile is representative of the underlying single-particle localized states. The geometric mean of the disordering potential correlation lengths is varied by a factor of four via adjusting the aperture of the speckle focusing lens. We observe that the root-mean-square size of the localized gas increases approximately linearly with the speckle correlation length, in qualitative agreement with the scaling predicted by weak scattering 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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