Actions of monoidally equivalent compact quantum groups and applications to probabilistic boundaries
Annales de l'Institut Fourier, Volume 60 (2010) no. 1, pp. 169-216.

The notion of monoidal equivalence for compact quantum groups was recently introduced by Bichon, De Rijdt and Vaes. In this paper we prove that there is a natural bijective correspondence between actions of monoidally equivalent quantum groups on unital C * -algebras or on von Neumann algebras. This correspondence turns out to be very useful to obtain the behavior of Poisson and Martin boundaries under monoidal equivalence of quantum groups. Finally, we apply these results to identify the Poisson boundary for the duals of quantum automorphism groups.

La notion de l’équivalence monoïdale pour les groupes quantiques compacts a été introduite récemment par Bichon, De Rijdt et Vaes. Dans cet article, nous montrons  : étant donné deux groupes quantiques compacts à équivalence monoïdale, alors il existe une correspondance bijective entre leurs actions. Cette correspondance s’avère être très utile pour obtenir la relation entre les frontières de Poisson et Martin des deux groupes quantiques compacts à équivalence monoïdale. Finalement, nous appliquons ces résultats au calcul des frontières de Poisson des duals associés aux groupes quantiques d’automorphismes.

DOI: 10.5802/aif.2520
Classification: 20G42
Keywords: Quantum groups, operator algebras, probability theory
Mot clés : groupes quantiques, algèbres d’opérateurs, théorie de probabilité
De Rijdt, An 1; Vander Vennet, Nikolas 2

1 Sint-Michielswarande 60 6T4, 1040 Brussel (Belgium)
2 Celestijnenlaan 200 B 3001 Heverlee (Belgium)
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De Rijdt, An; Vander Vennet, Nikolas. Actions of monoidally equivalent compact quantum groups and applications to probabilistic boundaries. Annales de l'Institut Fourier, Volume 60 (2010) no. 1, pp. 169-216. doi : 10.5802/aif.2520. https://aif.centre-mersenne.org/articles/10.5802/aif.2520/

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