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Phys Rev Lett. 2004 Jan 30;92(4):047901. Epub 2004 Jan 30.

Teleportation scheme implementing the universal optimal quantum cloning machine and the universal NOT gate.

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Dipartimento di Fisica and Istituto Nazionale per la Fisica della Materia, Università di Roma La Sapienza, Rome 00185, Italy.


By a significant modification of the standard protocol of quantum state teleportation, two processes "forbidden" by quantum mechanics in their exact form, the universal NOT gate and the universal optimal quantum cloning machine, have been implemented contextually and optimally by a fully linear method. In particular, the first experimental demonstration of the tele-UNOT gate, a novel quantum information protocol, has been reported. The experimental results are found in full agreement with theory.

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