Phys. Rev. Lett. 76, 722–725 (1996)Purification of Noisy Entanglement and Faithful Teleportation via Noisy ChannelsSee Also: Erratum Received 24 April 1995; published in the issue dated 29 January 1996 Two separated observers, by applying local operations to a supply of not-too-impure entangled states (e.g., singlets shared through a noisy channel), can prepare a smaller number of entangled pairs of arbitrarily high purity (e.g., near-perfect singlets). These can then be used to faithfully teleport unknown quantum states from one observer to the other, thereby achieving faithful transmission of quantum information through a noisy channel. We give upper and lower bounds on the yield D(M) of pure singlets (|Ψ-〉) distillable from mixed states M, showing D(M)>0 if 〈Ψ-|M|Ψ-〉>1/2. © 1996 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.76.722
DOI:
10.1103/PhysRevLett.76.722
PACS:
03.65.Bz, 42.50.Dv, 89.70.+c
See AlsoErratum: Charles H. Bennett, Gilles Brassard, Sandu Popescu, Benjamin Schumacher, John A. Smolin, and William K. Wootters, Purification of Noisy Entanglement and Faithful Teleportation via Noisy Channels[Phys. Rev. Lett. 76, 722 (1996)], Phys. Rev. Lett. 78, 2031 (1997). |
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