Results 1 to 10 of about 26,596 (173)

Free W*-Dynamical Systems From p-Adic Number Fields and the Euler Totient Function

open access: yesMathematics, 2015
In this paper, we study relations between free probability on crossed product W * -algebras with a von Neumann algebra over p-adic number fields
Ilwoo Cho, Palle E. T. Jorgensen
doaj   +1 more source

Kadison-Kastler stable factors [PDF]

open access: yes, 2014
A conjecture of Kadison and Kastler from 1972 asks whether sufficiently close operator algebras in a natural uniform sense must be small unitary perturbations of one another. For n≥3 and a free, ergodic, probability measure-preserving action of SL<sub&
Cameron, Jan   +5 more
core   +3 more sources

Connes' embedding problem and Tsirelson's problem [PDF]

open access: yes, 2010
We show that Tsirelson's problem concerning the set of quantum correlations and Connes' embedding problem on finite approximations in von Neumann algebras (known to be equivalent to Kirchberg's QWEP conjecture) are essentially equivalent.
Bożejko M.   +16 more
core   +5 more sources

The splitting process in free probability theory [PDF]

open access: yes, 2015
Free cumulants were introduced by Speicher as a proper analog of classical cumulants in Voiculescu's theory of free probability. The relation between free moments and free cumulants is usually described in terms of Moebius calculus over the lattice of ...
Ebrahimi-Fard, Kurusch, Patras, Frederic
core   +3 more sources

Spacetime-Free Approach to Quantum Theory and Effective Spacetime Structure [PDF]

open access: yes, 2017
Motivated by hints of the effective emergent nature of spacetime structure, we formulate a spacetime-free algebraic framework for quantum theory, in which no a priori background geometric structure is required.
Raasakka, Matti
core   +3 more sources

Free products of operator spaces and free Markov processes [PDF]

open access: yes, 2004
Certain (reduced) free product is introduced in the framework of operator spaces. Under the construction, the free product of preduals of von Neumann algebras agrees with the predual of the free product of von Neumann algebras.
Gao, Mingchu
core   +1 more source

Complete descriptions of intermediate operator algebras by intermediate extensions of dynamical systems

open access: yes, 2019
Practically and intrinsically, inclusions of operator algebras are of fundamental interest. The subject of this paper is intermediate operator algebras of inclusions.
Suzuki, Yuhei
core   +1 more source

On the first continuous $L^2$-cohomology of free group factors

open access: yes, 2014
We prove that the first continuous $L^2$-cohomology of free group factors vanishes. This answers a question by Andreas Thom regarding continuity properties of free difference quotients and shows that one can not distinguish free group factors by means of
Alekseev, Vadim
core   +1 more source

Continuous Family of Invariant Subspaces for R-diagonal Operators

open access: yes, 2001
We show that every R-diagonal operator x has a continuous family of invariant subspaces relative to the von Neumann algebra generated by x. This allows us to find the Brown measure of x and to find a new conceptual proof that Voiculescu's S-transform is ...
Sniady, Piotr, Speicher, Roland
core   +2 more sources

Invariant Coupling of Determinantal Measures on Sofic Groups

open access: yes, 2014
To any positive contraction $Q$ on $\ell^2(W)$, there is associated a determinantal probability measure ${\mathbf P}^Q$ on $2^W$, where $W$ is a denumerable set. Let $\Gamma$ be a countable sofic finitely generated group and $G = (\Gamma, \mathsf{E})$ be
Lyons, Russell, Thom, Andreas
core   +1 more source

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