Gromov-Hausdorff Convergence of Spectral Truncations for Quantum Groups

We study the quantum Gromov-Hausdorff convergence of spectral truncations for compact quantum groups.

Using a proper length function, we define a Dirac operator and the associated spectral truncations.

This work extends the previous convergence results for tori (Leimbach-van Suijlekom) to a broad class of quantum groups, and provides Gromov-Hausdorff convergence result for spectral truncations on quantum groups, encompassing both compact and discrete quantum groups.

Our results are applicable to $SU(N)$,$SO(N)$ and discrete quantum groups with rapid decay.