Localisation for non-monotone Schroedinger operators

Details Localisation for non-monotone Schroedinger operators Localisation for non-monotone Schroedinger operators

2012-01-11

arxiv.org/abs/1201.2211v3

Physics

Mathematical Physics

21pp; expanded introduction, added references, fixed typos

Scientific paper

We study localisation effects of strong disorder on the spectral and dynamical properties of (matrix and scalar) Schroedinger operators with non-monotone random potentials, on the d-dimensional lattice. Our results include dynamical localisation, i.e. exponentially decaying bounds on the transition amplitude in the mean. They are derived through the study of fractional moments of the resolvent, which are finite due to resonance-diffusing effects of the disorder. One of the byproducts of the analysis is a nearly optimal Wegner estimate. A particular example of the class of systems covered by our results is the discrete alloy-type Anderson model.

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