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Simplicity of eigenvalues in Anderson-type models
release_zixbbkr6gzau5b6geakbz3lvte
by
Sergey Naboko, Roger Nichols, Günter Stolz
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as a article
.
(2010)
Abstract
We show almost sure simplicity of eigenvalues for several models of
Anderson-type random Schr\"odinger operators, extending methods introduced by
Simon for the discrete Anderson model. These methods work throughout the
spectrum and are not restricted to the localization regime. We establish
general criteria for the simplicity of eigenvalues which can be interpreted as
separately excluding the absence of local and global symmetries, respectively.
The criteria are applied to Anderson models with matrix-valued potential as
well as with single-site potentials supported on a finite box.
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1001.3440v1
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