English

Bernoulli crossed products without almost periodic weights

Operator Algebras 2015-09-01 v1

Abstract

We prove a classification result for a large class of noncommutative Bernoulli crossed products (P,ϕ)ΛΛ(P,\phi)^\Lambda \rtimes \Lambda without almost periodic states. Our results improve the classification results from [1], where only Bernoulli crossed products built with almost periodic states could be treated. We show that the family of factors (P,ϕ)ΛΛ(P,\phi)^\Lambda \rtimes \Lambda with PP an amenable factor, ϕ\phi a weakly mixing state (i.e. a state for which the modular automorphism group is weakly mixing) and Λ\Lambda belonging to a large class of groups, is classified by the group Λ\Lambda and the action Λ(P,ϕ)Λ\Lambda \curvearrowright (P, \phi)^\Lambda, up to state preserving conjugation of the action. [1] Stefaan Vaes and Peter Verraedt. Classification of type III Bernoulli crossed products. Adv. Math., 281:296-332, 2015.

Keywords

Cite

@article{arxiv.1508.07417,
  title  = {Bernoulli crossed products without almost periodic weights},
  author = {Peter Verraedt},
  journal= {arXiv preprint arXiv:1508.07417},
  year   = {2015}
}

Comments

22 pages

R2 v1 2026-06-22T10:44:14.723Z