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arXiv 1105.0097math-phmath.MP
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随机酉模型及其局部化性质

Random Unitary Models and their Localization Properties

Alain Joye

摘要:

本文的目的是提出几个模型的量子动力学的描述涉及分析的随机酉矩阵的动力学局域化已被证明是成立的。一些模型来自物理近似,导致在凝聚态理论物理中流行的某些随机系统的动力学的有效描述,而其他模型则在更抽象的考虑和概括中找到它们的根源。虽然它们可能在细节上有所不同,但描述模型的算子都具有以下关键特征:它们的动力学是由无穷维基础希尔伯特空间上的酉算子产生的,当表示为矩阵时,在一定的基础上具有能带结构,并且模型的随机性在于矩阵元素的相位。

英文摘要:

This paper aims at presenting a few models of quantum dynamics whose description involves the analysis of random unitary matrices for which dynamical localization has been proven to hold. Some models come from physical approximations leading to effective descriptions of the dynamics of certain random systems that are popular in condensed matter theoretical physics, whereas others find their roots in more abstract considerations and generalizations. Although they may differ in details, the operators describing the models all have in common the following key features on which their analysis relies heavily: their dynamics is generated by unitary operators on an infinite dimensional underlying Hilbert space which have a band structure when expressed as matrices in a certain basis and the randomness of the models lies in phases of the matrix elements.

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