Long-Lived Qubit Memory Using Atomic Ions

Published

August 5, 2005

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

Pub Type

Journals

Download Paper

Local Download

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 April 23, 2024)