No-cloning theorem and teleportation criteria for quantum continuous variables

Details No-cloning theorem and teleportation criteria for quantum continuous variables No-cloning theorem and teleportation criteria for quantum continuous variables

2000-12-21

arxiv.org/abs/quant-ph/0012121v1

Phys. Rev. A 64, 010301 (2001)

Physics

Quantum Physics

4 pages, 1 figure, submitted to Phys. Rev. A

Scientific paper

10.1103/PhysRevA.64.010301

We discuss the criteria presently used for evaluating the efficiency of quantum teleportation schemes for continuous variables. Using an argument based upon the difference between 1-to-2 quantum cloning (quantum duplication) and 1-to-infinity cloning (classical measurement), we show that a fidelity value larger than 2/3 is required for successful quantum teleportation of coherent states. This value has not been reached experimentally so far.

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