Non injectivity of the q-deformed von Neumann algebra

Alexandre Nou (1, 2)

1 MAPMO - Mathématiques - Analyse, Probabilités, Modélisation - Orléans
2 LMB - Laboratoire de Mathématiques de Besançon (UMR 6623)

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.

Mots clés: injectivity; Gaussian; deformation; Yang-Baxter Operator

Domaines: Algèbres d'opérateurs [math.OA]

Alexandre Nou. Non injectivity of the q-deformed von Neumann algebra. Mathematische Annalen, 2004, 330 number 1, pp.17-38. ⟨10.1007/s00208-004-0523-4⟩. ⟨hal-00077597⟩