Random Unitary Models and their Localization Properties

Details Random Unitary Models and their Localization Properties Random Unitary Models and their Localization Properties

2011-04-30

arxiv.org/abs/1105.0097v1

Physics

Mathematical Physics

Notes prepared for the "Arizona School of Analysis with Applications 2010". To appear in Contemporary Mathematics

Scientific paper

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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