Quantum cloning and teleportation criteria for continuous quantum variables
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- 12 June 2001
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review A
- Vol. 64 (1) , 010301
- https://doi.org/10.1103/physreva.64.010301
Abstract
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 warrants that the teleported state is the best possible remaining copy of the input state. This value has not been reached experimentally so far.Keywords
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