Reducibility or non-uniform hyperbolicity for quasiperiodic Schrodinger cocycles

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We show that for almost every frequency alpha \in \R \setminus \Q, for every C^omega potential v:\R/\Z \to R, and for almost every energy E the corresponding quasiperiodic Schrodinger cocycle is either reducible or nonuniformly hyperbolic. This result gives very good control on the absolutely continuous part of the spectrum of the corresponding quasiperiodic Schrodinger operator, and allows us to complete the proof of the Aubry-Andre conjecture on the measure of the spectrum of the Almost Mathieu Operator.
30 pages, published version

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Dynamical Systems, Mathematical Physics, Spectral Theory

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http://salesiana.dossiersoluciones.com/handle/123456789/127946

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/math/0306382
 http://arxiv.org/abs/math/0306382
 Ann. of Math. (2) 164 (2006), no. 3, 911--940

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arXiv