Linear Deformations of Heisenberg Modules and Gabor Frames

TL;DR

This paper explores the deformation of Heisenberg modules over noncommutative tori using Gabor frames, extending existing results and establishing new theorems like a Balian-Low type result.

Contribution

It extends deformation results of Gabor frames to Heisenberg modules and introduces a generalized Fell's condition for bundles of noncommutative tori.

Findings

Established an analog of Feichtinger-Kaiblinger results for Heisenberg modules

Proved a Balian-Low theorem in this new context

Extended results to multiple generators on the bundle of Heisenberg modules

Abstract

Heisenberg modules over noncommutative tori may also be viewed as Gabor frames. Building on this fact, we relate to deformations of noncommutative tori a bundle of Banach spaces induced by Heisenberg modules. The construction of this bundle of Banach spaces rests on deformation results of Gabor frames with windows in Feichtinger's algebra due to Feichtinger and Kaiblinger. We extend some of these results to Heisenberg modules, \eg we establish an analog of the results by Feichtinger-Kaiblinger and a Balian-Low theorem. Finally, we extend our results to several generators on the bundle of Heisenberg modules and show that they provide a generalized Fell's condition on the bundle of noncommutative tori.