Non injectivity of the q-deformed von Neumann algebra

Details Non injectivity of the q-deformed von Neumann algebra Non injectivity of the q-deformed von Neumann algebra

2006-05-31

arxiv.org/abs/math/0605789v1

Mathematische Annalen 330 number 1 (2004) 17-38

Mathematics

Operator Algebras

Scientific paper

10.1007/s00208-004-0523-4

We prove that the von Neumann algebra generated by q-gaussians is not injective as soon as the dimension of the underlying Hilbert space is greater than 1. Our approach is based on a vector valued Khintchine type inequality for Wick products. The same proof also works for the more general setting of a Yang-Baxter deformation. Our techniques can also be extended to the so called q-Araki-Woods von Neumann algebras recently introduced by Hiai. In this latter case, we obtain the non injectivity under some asssumption on the spectral set of the positive operator associated with the deformation.

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