Special Session 89: DYNAMICS AND SPECTRA OF QUASIPERIODIC SCHRODINGER OPERATORS

Exact local distribution of the absolutely continuous spectral measure

Xianzhe Li
Nankai University
Peoples Rep of China
Co-Author(s):    Jiangong You and Qi Zhou
Abstract:
It is well-established that the spectral measure for one-frequency Schr\odinger operators with Diophantine frequencies exhibits optimal $1/2$-H\older continuity within the absolutely continuous spectrum. This study extends these findings by precisely characterizing the local distribution of the spectral measure for dense small potentials, including a notable result for any subcritical almost Mathieu operators. Additionally, we investigate the stratified H\older continuity of the spectral measure at subcritical energies.