Contextual, Optimal and Universal Realization of the Quantum Cloning Machine and of the NOT gate

Details Contextual, Optimal and Universal Realization of the Quantum Cloning Machine and of the NOT gate Contextual, Optimal and Universal Realization of the Quantum Cloning Machine and of the NOT gate

2003-12-15

arxiv.org/abs/quant-ph/0312124v1

Phys. Rev. Lett. 92, 067901 (2004)

Physics

Quantum Physics

10 pages, 2 figures

Scientific paper

10.1103/PhysRevLett.92.067901

A simultaneous realization of the Universal Optimal Quantum Cloning Machine (UOQCM) and of the Universal-NOT gate by a quantum injected optical parametric amplification (QIOPA), is reported. The two processes, forbidden in their exact form for fundamental quantum limitations, are found universal and optimal, and the measured fidelity F<1 is found close to the limit values evaluated by quantum theory. This work may enlighten the yet little explored interconnections of fundamental axiomatic properties within the deep structure of quantum mechanics.

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