Experimental purification of two-atom entanglement

R. Reichle, D. Leibfried (), E. Knill, J. Britton, R. B. Blakestad, J. D. Jost, C. Langer, R. Ozeri, S. Seidelin and D. J. Wineland
Additional contact information
R. Reichle: National Institute of Standards and Technology
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

Nature, 2006, vol. 443, issue 7113, 838-841

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.

Date: 2006
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DOI: 10.1038/nature05146

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