Criteria for Continuous-Variable Quantum Teleportation

Details Criteria for Continuous-Variable Quantum Teleportation Criteria for Continuous-Variable Quantum Teleportation

1999-10-07

arxiv.org/abs/quant-ph/9910030v1

Physics

Quantum Physics

12 pages, to appear in Journal of Modern Optics

Scientific paper

We derive an experimentally testable criterion for the teleportation of quantum states of continuous variables. This criterion is especially relevant to the recent experiment of Furusawa et al. [Science 282, 706-709 (1998)] where an input-output fidelity of $0.58 \pm 0.02$ was achieved for optical coherent states. Our derivation demonstrates that fidelities greater than 1/2 could not have been achieved through the use of a classical channel alone; quantum entanglement was a crucial ingredient in the experiment.

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