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arXiv 0812.1654cond-mat.dis-nn
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三维Anderson跃迁概率密度函数的多重分形分析

Multifractal analysis with the probability density function at the three-dimensional Anderson transition

Alberto Rodriguez, Louella J. Vasquez, Rudolf A. Roemer

摘要:

在三维Anderson模型中研究了临界波函数振幅的概率密度函数。我们提出了一个正式的PDF和多重分形谱f(alpha)之间的表达,其中有限大小的校正的作用进行了适当的分析。我们显示的非高斯性质和存在的对称关系的PDF。从PDF中,我们提取有关f(alpha)在临界状态下的信息,如存在负分形维数,我们评论可能存在的终止点。基于PDF的多重分形分析,因此被证明是一个有效的替代标准的方法的基础上缩放的一般逆参与率。

英文摘要:

The probability density function (PDF) for critical wavefunction amplitudes is studied in the three-dimensional Anderson model. We present a formal expression between the PDF and the multifractal spectrum f(alpha) in which the role of finite-size corrections is properly analyzed. We show the non-gaussian nature and the existence of a symmetry relation in the PDF. From the PDF, we extract information about f(alpha) at criticality such as the presence of negative fractal dimensions and we comment on the possible existence of termination points. A PDF-based multifractal analysis is hence shown to be a valid alternative to the standard approach based on the scaling of general inverse participation ratios.

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