TY - JOUR
T1 - Anderson localization for the almost Mathieu equation, III. Semi-uniform localization, continuity of gaps, and measure of the spectrum
AU - Jitomirskaya, Svetlana Ya
AU - Last, Yoram
PY - 1998
Y1 - 1998
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=0032121409&partnerID=8YFLogxK
U2 - 10.1007/s002200050376
DO - 10.1007/s002200050376
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AN - SCOPUS:0032121409
SN - 0010-3616
VL - 195
SP - 1
EP - 14
JO - Communications in Mathematical Physics
JF - Communications in Mathematical Physics
IS - 1
ER -