A note on intermediate subfactors of Krishnan-Sunder subfactors

Bina Bhattacharyya

A Krishnan-Sunder subfactor $R_UßR$ of index $k^2$ is constructed from a permutation biunitary matrix $U\in M_p(\mathbb{C})\otimes M_k(\mathbb{C})$, i.e. the entries of $U$ are ei…