A Continuity Theorem for Stinespring's Dilation
Kretschmann, Dennis · Schlingemann, Dirk · Werner, Reinhard F.
Original · EN
We show a continuity theorem for Stinespring's dilation: two completely positive maps between arbitrary C*-algebras are close in cb-norm iff we can find corresponding dilations that are close in operator norm. The proof establishes the equivalence of the cb-norm distance and the Bures distance for completely positive maps. We briefly discuss applications to quantum information theory.
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