Quantitative mean ergodic inequalities: power bounded operators acting on one single noncommutative $L_p$ space
Abstract
In this paper, we establish the quantitative mean ergodic theorems for two subclasses of power bounded operators on a fixed noncommutative -space with , which mainly concerns power bounded invertible operators and Lamperti contractions. Our approach to the quantitative ergodic theorems is the noncommutative square function inequalities. The establishment of the latter involves several new ingredients such as the almost orthogonality and Calder\'on-Zygmund arguments for non-smooth kernels from semi-commutative harmonic analysis, the extension properties of the operators under consideration from operator theory, and a noncommutative version of the classical transference method due to Coifman and Weiss.
Keywords
Cite
@article{arxiv.2301.00186,
title = {Quantitative mean ergodic inequalities: power bounded operators acting on one single noncommutative $L_p$ space},
author = {Guixiang Hong and Wei Liu and Bang Xu},
journal= {arXiv preprint arXiv:2301.00186},
year = {2023}
}
Comments
33 pages. Based the feedbacks from colleagues, we incorporate the referee's comments and improve substantially the presentation of the paper. In particular, we delete some arguments that might be known to experts and add Remark 7.5 for another approach to show the isometric extension of positive isometry in the case $1<p<2$