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Optimal universal and state-dependent quantum cloning

✍ Scribed by Bruß, Dagmar; DiVincenzo, David P.; Ekert, Artur; Fuchs, Christopher A.; Macchiavello, Chiara; Smolin, John A.

Book ID: 121184701
Publisher: The American Physical Society
Year: 1998
Tongue: English
Weight: 235 KB
Volume: 57
Category: Article
ISSN: 1050-2947
DOI: 10.1103/PhysRevA.57.2368

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## Abstract An arbitrary quantum state cannot be “cloned” perfectly, i.e. reproduced with “fidelity” __F__ = 1 into __M__ > 1 states identical to the original by any conceivable physical device. The main root of this impossibility resides in the linearity of quantum mechanics. A second “quantum imp