Must the Spectrum of a Random Schrodinger Operator Contain an Interval?

被引:6
|
作者
Damanik, David [1 ]
Gorodetski, Anton [2 ,3 ]
机构
[1] Rice Univ, Dept Math, Houston, TX 77005 USA
[2] Univ Calif Irvine, Dept Math, Irvine, CA 92697 USA
[3] Natl Res Univ Higher Sch Econ, Nizhnii Novgorod, Russia
关键词
CANTOR SPECTRUM; UNIFORM HYPERBOLICITY; RANDOM PERTURBATIONS; HOLDER CONTINUITY; LEBESGUE MEASURE; ROTATION NUMBER; MEASURE ZERO; LOCALIZATION; SUBORDINACY; POTENTIALS;
D O I
10.1007/s00220-022-04395-w
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
We consider Schrodinger operators in t 2 (Z) whose potentials are given by independent (not necessarily identically distributed) random variables. We ask whether it is true that almost surely its spectrum contains an interval. We provide an affirmative answer in the case of random potentials given by a sum of a perturbatively small quasiperiodic potential with analytic sampling function and Diophantine frequency vector and a term of Anderson type, given by independent identically distributed random variables (with some small-gap assumption for the support of the single-site distribution). The proof proceeds by extending a result about the presence of ground states for atypical realizations of the classical Anderson model, which we prove here as well and which appears to be new.
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页码:1583 / 1613
页数:31
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