Nonlinear Anderson localized states at arbitrary disorder

preprint2022arXivOpen access

Abstract

It is classical, following Furstenberg's theorem on positive Lyapunov exponent for products of random SL(2,R)(2, \mathbb R) matrices, that the one dimensional random Schrödinger operator has Anderson localization at arbitrary disorder. This paper proves a nonlinear analogue, thereby establishing a KAM-type persistence result for a non-integrable system.

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