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Phys. Rev. A 66, 042326 (2002) [5 pages]

Continuous-variable quantum teleportation of entanglement

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Tyler J. Johnson1,2, Stephen D. Bartlett2, and Barry C. Sanders2
1California Institute of Technology, Pasadena, California 91125
2Department of Physics and Centre for Advanced Computing—Algorithms and Cryptography, Macquarie University, Sydney, New South Wales 2109, Australia

Received 3 April 2002; published 30 October 2002

Entangled coherent states can be used to determine the entanglement fidelity for a device that is designed to teleport coherent states. This entanglement fidelity is universal in that the calculation is independent of the use of entangled coherent states and applies generally to the teleportation of entanglement using coherent states. The average fidelity is shown to be a poor indicator of the capability of teleporting entanglement; i.e., very high average fidelity for the quantum teleportation apparatus can still result in low entanglement fidelity for one-mode of the two-mode entangled coherent states.

© 2002 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevA.66.042326
DOI:
10.1103/PhysRevA.66.042326
PACS:
03.67.Hk, 03.65.Ud, 03.65.Wj, 42.50.Ar