Abstract
We show that the almost Mathieu operator, (Hωλθψ)(η) = ψ(η+1) + ψ(η-1)+ λ cos(πωη+θ)ψ(η), has semi-uniform (and thus dynamical) localization for λ > 15 and a.e. ω, θ. We also obtain a new estimate on gap continuity (in ω) for this operator with λ > 29 (or λ < 4/29), and use it to prove that the measure of its spectrum is equal to |4 -2|λ|| for A in this range and all irrational ωs.
| Original language | English |
|---|---|
| Pages (from-to) | 1-14 |
| Number of pages | 14 |
| Journal | Communications in Mathematical Physics |
| Volume | 195 |
| Issue number | 1 |
| DOIs | |
| State | Published - 1998 |
| Externally published | Yes |
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