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Journal of Operator Theory

Volume 64, Issue 1, Summer 2010  pp. 149-154.

Continuity of CP-semigroups in the point-strong operator topology

Authors Daniel Markiewicz (1) and Orr Moshe Shalit (2)
Author institution: (1) Department of Mathematics, University of Toronto, 40 St. George St., Room 6290, Toronto, ON M5S 2E4, Canada
(2) Department of Mathematics, Technion - Israel Institute of Technology, 32000, Haifa, Israel


Summary:  We prove that if {ϕt}t is a CP-semigroup acting on a von Neumann algebra M \subseteq B(H), then for every A\in M and \xi \in H, the map t \mapsto \phi_t(A)\xi is norm-continuous. We discuss the implications of this fact to the existence of dilations of CP-semigroups to semigroups of endomorphisms.


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