Experimental reversion of the optimal quantum cloning and flipping processes

Details Experimental reversion of the optimal quantum cloning and flipping processes Experimental reversion of the optimal quantum cloning and flipping processes

2005-04-28

arxiv.org/abs/quant-ph/0504212v1

Phys. Rev. A 73, 040303 (R) (2006)

Physics

Quantum Physics

10 pages, 3 figures

Scientific paper

10.1103/PhysRevA.73.040303

The quantum cloner machine maps an unknown arbitrary input qubit into two optimal clones and one optimal flipped qubit. By combining linear and non-linear optical methods we experimentally implement a scheme that, after the cloning transformation, restores the original input qubit in one of the output channels, by using local measurements, classical communication and feedforward. This significant teleportation-like method demonstrates how the information is preserved during the cloning process. The realization of the reversion process is expected to find useful applications in the field of modern multi-partite quantum cryptography.

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