$C^{\ast }$-algebras from planar algebras II: the Guionnet-Jones-Shlyakhtenko $C^{\ast }$-algebras

Abstract

We study the $C^{\ast }$-algebras arising in the construction of Guionnet-Jones-Shlyakhtenko (GJS) for a planar algebra. In particular, we show they are pairwise strongly Morita equivalent, we compute their $K$-groups, and we prove many properties, such as simplicity, unique trace, and stable rank 1. Interestingly, we see a $K$-theoretic obstruction to the GJS $C^{\ast }$-algebra analog of Goldman-type theorems for II${}_1$-subfactors. This is the second article in a series studying canonical $C^{\ast }$-algebras associated to a planar algebra.

30 pages, many figures

References in corpus (1)

• Random matrices, free probability, planar algebras and subfactors

Cited by in corpus (1)

• Free transport for interpolated free group factors