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Long-Lived Qubit Memory Using Atomic Ions

Published

Author(s)

C. Langer, R Ozeri, John D. Jost, J Chiaverini, B. L. DeMarco, A. Ben-Kish, Brad R. Blakestad, Joseph W. Britton, David Hume, Wayne M. Itano, Dietrich G. Leibfried, Rainer Reichle, Till P. Rosenband, Tobias Schaetz, Piet Schmidt, David J. Wineland

Abstract

We demonstrate experimentally a robust quantum memory using a magnetic-field-independent hyperfine transition in 9Be+ atomic ioin qubits at a magnetic field B=0.01194 T. We observe the single physical qubit memory coherence time to be greater than 10 seconds, an improvement of approximately five orders of magnitude from previous experiments in 9Be+, nearly eliminating memory errors in this system. 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.
Citation
Physical Review Letters
Volume
95
Issue
060502

Keywords

atom trapping and cooling, decoherence-fre subspace, long coherence time, quantum computation, quantum information processing, quantum memory, quantum superpositions, quantum-state engineering, trapped ions

Citation

Langer, C. , Ozeri, R. , Jost, J. , Chiaverini, J. , DeMarco, B. , Ben-Kish, A. , Blakestad, B. , Britton, J. , Hume, D. , Itano, W. , Leibfried, D. , Reichle, R. , Rosenband, T. , Schaetz, T. , Schmidt, P. and Wineland, D. (2005), Long-Lived Qubit Memory Using Atomic Ions, Physical Review Letters, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=50124 (Accessed October 28, 2021)
Created August 5, 2005, Updated January 27, 2020