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Published October 23, 1998 | public
Journal Article

Unconditional Quantum Teleportation

Abstract

Quantum teleportation of optical coherent states was demonstrated experimentally using squeezed-state entanglement. The quantum nature of the achieved teleportation was verified by the experimentally determined fidelity F^(exp) = 0.58 ± 0.02, which describes the match between input and output states. A fidelity greater than 0.5 is not possible for coherent states without the use of entanglement. This is the first realization of unconditional quantum teleportation where every state entering the device is actually teleported.

Additional Information

© 1998 American Association for the Advancement of Science. Received 20 July 1998; accepted 2 September 1998. The experiment was carried out in the Quantum Optics Group at the California Institute of Technology. Supported by the Quantum Information and Computation Institute funded by the Defense Advanced Research Projects Agency via the Army Research Office, by the Office of Naval Research, and by NSF. A.F. is a visiting scientist from the Nikon Research Laboratories. S.L.B. was funded in part by Engineering and Physical Sciences Research Council (UK) grant GR/L91344. C.A.F. also acknowledges support from a Lee A. DuBridge Fellowship. J.L.S. and E.S.P. acknowledge support from the Danish Research Council. We gratefully acknowledge the contributions of N. Ph. Georgiades and discussions with C. M. Caves, N. Cohen, S. J. van Enk, and H. Mabuchi.

Additional details

Created:
August 19, 2023
Modified:
October 18, 2023