Long-lived qubit memory using atomic ions

C. Langer, R. Ozeri, J. D. Jost, J. Chiaverini, B. Demarco, A. Ben-Kish, R. B. Blakestad, J. Britton, D. B. Hume, W. M. Itano, D. Leibfried, R. Reichle, T. Rosenband, T. Schaetz, P. O. Schmidt, D. J. Wineland

Research output: Contribution to journalArticlepeer-review

Abstract

We demonstrate experimentally a robust quantum memory using a magnetic-field-independent hyperfine transition in Be+9 atomic ion qubits at a magnetic field B 0.01194T. 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 Be+9. 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.

Original languageEnglish (US)
Article number060502
JournalPhysical review letters
Volume95
Issue number6
DOIs
StatePublished - Aug 5 2005
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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