Distances between matrix algebras that converge to coadjoint orbits.

link: http://arxiv.org/abs/0910.1968
Abstract

For any sequence of matrix algebras that converge to a coadjoint orbit we
give explicit formulas that show that the distances between the matrix algebras
(viewed as quantum metric spaces) converges to 0. In the process we develop a
general point of view that is likely to be useful in other related settings.