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arXiv 1209.1606cond-mat.dis-nn
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利用一维散斑势中的无序关联剪裁安德森局域化

Tailoring Anderson localization by disorder correlations in 1D speckle potentials

Marie Piraud, Laurent Sanchez-Palencia

摘要:

研究了连续关联一维无序势场中单粒子的安德森局域化。我们表明,定制的相关性可以完全改变本地化长度的能量依赖性。通过考虑两个合适的模型的障碍,我们明确表明,无序相关性可以导致一个非单调的行为的本地化长度与能量。内进行的数值计算的传输矩阵的方法和分析计算内的相位形式主义的顺序三显示出良好的协议,并证明效果。最后,我们展示了如何使用膨胀的超冷原子气体的局域化长度与能量的非单调行为可以观察到。

英文摘要:

We study Anderson localization of single particles in continuous, correlated, one-dimensional disordered potentials. We show that tailored correlations can completely change the energy-dependence of the localization length. By considering two suitable models of disorder, we explicitly show that disorder correlations can lead to a nonmonotonic behavior of the localization length versus energy. Numerical calculations performed within the transfer-matrix approach and analytical calculations performed within the phase formalism up to order three show excellent agreement and demonstrate the effect. We finally show how the nonmonotonic behavior of the localization length with energy can be observed using expanding ultracold-atom gases.

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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