Teleporting an unknown quantum state via dual classic and Einstein–Podolsky–Rosen channels. Our result confirms the feasibility of space-based experiments, and is an important step towards quantum-communication applications on a global scale.īennett, C. ![]() Our experiment has realized all of the non-local aspects of the original teleportation scheme and is equivalent to it up to a local unitary operation 5. ![]() An average fidelity of 89%, well beyond the classical limit of 2/3, is achieved. An active feed-forward technique has been developed to enable real-time information transfer. By following the Rome scheme 5, which allows a full Bell-state measurement, we report free-space implementation of quantum teleportation over 16 km. An optical free-space link is highly desirable for extending the transfer distance, because of its low atmospheric absorption for certain ranges of wavelength. ![]() Although the first proof-of-principle demonstration was reported in 1997 by the Innsbruck 4 and Rome groups 5, long-distance teleportation has so far only been realized in fibre with lengths of hundreds of metres 6, 7. Quantum teleportation 1 is central to the practical realization of quantum communication 2, 3.
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