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A complete classification of quantum ensembles having a given density matrix

โœ Scribed by Lane P. Hughston; Richard Jozsa; William K. Wootters


Publisher
Elsevier Science
Year
1993
Tongue
English
Weight
337 KB
Volume
183
Category
Article
ISSN
0375-9601

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## Abstract A feedback arc set of a digraph is a set of arcs whose reversal makes the resulting digraph acyclic. Given a tournament with a disjoint union of directed paths as a feedback arc set, we present necessary and sufficient conditions for this feedback arc set to have minimum size. We will p