Half-line eigenfunction estimates and singular continuous spectrum of zero Lebesgue measure

Details Half-line eigenfunction estimates and singular continuous spectrum of zero Lebesgue measure Half-line eigenfunction estimates and singular continuous spectrum of zero Lebesgue measure

1999-05-18

arxiv.org/abs/math/9905099v3

Mathematics

Spectral Theory

15 pages; extended and corrected version of the paper "Half-line eigenfunction estimates and stability of singular continuous

Scientific paper

We consider discrete one-dimensional Schr\"odinger operators with strictly ergodic, aperiodic potentials taking finitely many values. The well-known tendency of these operators to have purely singular continuous spectrum of zero Lebesgue measure is further elucidated. We provide a unified approach to both the study of the spectral type as well as the measure of the spectrum as a set. We apply this approach to Schr\"odinger operators with Sturmian potentials. Finally, in the appendix, we discuss the two different strictly ergodic dynamical systems associated to a circle map.

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