Ergodicity and dynamical localization for Delone-Anderson operators

Abstract

We study the ergodic properties of Delone-Anderson operators, using the framework of randomly coloured Delone sets and Delone dynamical systems. In particular, we show the existence of the integrated density of states and, under some assumptions on the geometric complexity of the underlying Delone sets, we obtain information on the almost-sure spectrum of the family of random operators. We then exploit these results to study the Lifshitz-tail behaviour of the integrated density of states of a Delone-Anderson operator at the bottom of the spectrum. Furthermore, we use Lifshitz-tail estimates as an input for the multi-scale analysis to prove dynamical localization.

33 pages, 1 figure. Changes in Section 3: the main result on localization now holds for operators associated to all Delone sets in the hull, improving the previous version which excluded a set of measure zero. In particular, dynamical localization holds for the operator associated to the original Delone set

References in corpus (3)

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