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Experimental purification of two-atom entanglement

Author

Listed:
  • R. Reichle

    (National Institute of Standards and Technology
    University of Ulm)

  • D. Leibfried

    (National Institute of Standards and Technology)

  • E. Knill

    (National Institute of Standards and Technology)

  • J. Britton

    (National Institute of Standards and Technology)

  • R. B. Blakestad

    (National Institute of Standards and Technology)

  • J. D. Jost

    (National Institute of Standards and Technology)

  • C. Langer

    (National Institute of Standards and Technology)

  • R. Ozeri

    (National Institute of Standards and Technology)

  • S. Seidelin

    (National Institute of Standards and Technology)

  • D. J. Wineland

    (National Institute of Standards and Technology)

Abstract

Pure entanglement Entanglement between physically separate quantum systems makes quantum communication and information processing possible. However, transporting one member of an entangled pair of quantum bits (photons or atoms, for example) to a different location causes the quality of the entanglement to be reduced by decoherence. One solution is to 'purify' the entanglement after the particles have been separated. This has now been achieved using beryllium ions: a high-fidelity entangled pair was distilled from two lower fidelity pairs in an efficient, non-destructive manner.

Suggested Citation

  • R. Reichle & D. Leibfried & E. Knill & J. Britton & R. B. Blakestad & J. D. Jost & C. Langer & R. Ozeri & S. Seidelin & D. J. Wineland, 2006. "Experimental purification of two-atom entanglement," Nature, Nature, vol. 443(7113), pages 838-841, October.
    • Handle: RePEc:nat:nature:v:443:y:2006:i:7113:d:10.1038_nature05146
    DOI: 10.1038/nature05146
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