Long-lived qubit memory using atomic ions

We demonstrate experimentally a robust quantum memory using a magnetic-field-independent hyperfine transition in 9Be+ atomic ion qubits at a magnetic field B approximately = 0.01194 T. We observe that the single physical qubit memory coherence time is greater than 10 s, an improvement of approximate...

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Bibliographic Details
Published in:Physical review letters 2005-08, Vol.95 (6), p.060502.1-060502.4, Article 060502
Main Authors: LANGER, C, OZERI, R, LEIBFRIED, D, REICHLE, R, ROSENBAND, T, SCHAETZ, T, SCHMIDT, P. O, WINELAND, D. J, JOST, J. D, CHIAVERINI, J, DEMARCO, B, BEN-KISH, A, BLAKESTAD, R. B, BRITTON, J, HUME, D. B, ITANO, W. M
Format: Article
Language:English
Subjects:
Exact sciences and technology
Physics
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Summary:We demonstrate experimentally a robust quantum memory using a magnetic-field-independent hyperfine transition in 9Be+ atomic ion qubits at a magnetic field B approximately = 0.01194 T. We observe that the single physical qubit memory coherence time is greater than 10 s, an improvement of approximately 5 orders of magnitude from previous experiments with 9Be+. We also observe long coherence times of decoherence-free subspace logical qubits comprising two entangled physical qubits and discuss the merits of each type of qubit.
ISSN:0031-9007
1079-7114
DOI:10.1103/PhysRevLett.95.060502