Continuous families of hyperfinite subfactors with the same standard invariant

Bisch, Dietmar; Nicoara, Remus; Popa, Sorin

Continuous families of hyperfinite subfactors with the same standard invariant

Authors

Bisch, Dietmar

Nicoara, Remus

Popa, Sorin

Description

We construct numerous continuous families of irreducible subfactors of the hyperfinite II$_1$ factor, which are non-isomorphic, but have all the same standard invariant. In particular, we obtain 1-parameter families of irreducible, non-isomorphic subfactors of the hyperfinite II$_1$ factor, which have Jones index 6 and have all the same standard invariant with property (T). We exploit the fact that property (T) groups have uncountably many non-cocycle conjugate cocycle actions on the hyperfinite II$_1$ factor.
13 pages