Spectral Theory of Pseudo-Ergodic Operators

Abstract

We define a class of pseudo-ergodic non-self-adjoint Schrödinger operators acting in spaces $l^2(X)$ and prove some general theorems about their spectral properties. We then apply these to study the spectrum of a non-self-adjoint Anderson model acting on $l^2(\mathbb{Z})$, and find the precise condition for 0 to lie in the spectrum of the operator. We also introduce the notion of localized spectrum for such operators.

22 pages

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