Zero measure spectrum for multi-frequency Schrödinger operators

Date
2022
Journal Title
Journal ISSN
Volume Title
Publisher
EMS Press
Abstract

Building on works of Berthé–Steiner–Thuswaldner and Fogg–Nous, we show that on the two-dimensional torus, Lebesgue almost every translation admits a natural coding such that the associated subshift satisfies the Boshernitzan criterion. As a consequence, we show that for these torus translations, every quasi-periodic potential can be approximated uniformly by one for which the associated Schrödinger operator has Cantor spectrum of zero Lebesgue measure. We also describe a framework that can allow this to be extended to higher-dimensional tori.

Description
Advisor
Degree
Type
Journal article
Keywords
Citation

Chaika, Jon, Damanik, David, Fillman, Jake, et al.. "Zero measure spectrum for multi-frequency Schrödinger operators." Journal of Spectral Theory, 12, no. 2 (2022) EMS Press: 573-590. https://doi.org/10.4171/jst/411.

Has part(s)
Forms part of
Rights
This work is licensed under a CC BY 4.0 license
Citable link to this page