BMO-estimates for non-commutative vector valued Lipschitz functions

M. Caspers, M. Junge, F. Sukochev, D. Zanin

Research output: Contribution to journalArticlepeer-review


We construct Markov semi-groups T and associated BMO-spaces on a finite von Neumann algebra (M,τ) and obtain results for perturbations of commutators and non-commutative Lipschitz estimates. In particular, we prove that for any A∈M self-adjoint and f:R→R Lipschitz there is a Markov semi-group T such that for x∈M, ‖[f(A),x]‖bmo(M,T)≤cabs‖f‖[A,x]‖. We obtain an analogue of this result for more general von Neumann valued-functions f:Rn→N by imposing Hörmander-Mikhlin type assumptions on f. In establishing these result we show that Markov dilations of Markov semi-groups have certain automatic continuity properties. We also show that Markov semi-groups of double operator integrals admit (standard and reversed) Markov dilations.

Original languageEnglish (US)
Article number108317
JournalJournal of Functional Analysis
Issue number3
StatePublished - Feb 1 2020


  • Commutator estimates
  • Non-commutative BMO-spaces
  • Non-commutative Lp-spaces
  • Quantum Markov semi-groups

ASJC Scopus subject areas

  • Analysis


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