We study a nonconventional ergodic average for asymptotically abelian weakly mixing C*-dynamical systems, related to a second iteration of Khinchin's recurrence theorem obtained by Bergelson in the measure-theoretic case. A noncommutative recurrence theorem for such systems is obtained as a corollary.
@article{bwmeta1.element.bwnjournal-article-doi-10_4064-sm192-3-3, author = {Rocco Duvenhage}, title = {Bergelson's theorem for weakly mixing C*-dynamical systems}, journal = {Studia Mathematica}, volume = {192}, year = {2009}, pages = {235-257}, zbl = {1181.46052}, language = {en}, url = {http://dml.mathdoc.fr/item/bwmeta1.element.bwnjournal-article-doi-10_4064-sm192-3-3} }
Rocco Duvenhage. Bergelson's theorem for weakly mixing C*-dynamical systems. Studia Mathematica, Tome 192 (2009) pp. 235-257. http://gdmltest.u-ga.fr/item/bwmeta1.element.bwnjournal-article-doi-10_4064-sm192-3-3/