Contextual, optimal, and universal realization of the quantum cloning machine and of the NOT gate

F De Martini, Daniele Pelliccia, F Sciarrino

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A simultaneous realization of the universal optimal quantum cloning machine and of the universal-NOT gate by a quantum injected optical parametric amplification, is reported. The two processes, forbidden in their exact form for fundamental quantum limitations, are found universal and optimal, and the measured fidelity F
Original languageEnglish
Pages (from-to)1 - 4
Number of pages4
JournalPhysical Review Letters
Issue number6
Publication statusPublished - 2004
Externally publishedYes

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