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Progress in the development of a single Cooper-pair box qubit

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Abstract

We describe in this review progress in techniques for measuring the quantum states of the single Cooper-pair box (SCB) at the Jet Propulsion Laboratory, and the use of these techniques to characterize their performance as quantum bits. Initially, the Radio-Frequency-Single-Electron Transistor was used to measure conventional and differential versions of the SCB. To overcome some of the difficulties associated with the radio-frequency single-electron transistor, a transition was made to readout based on the quantum capacitance technique. Using this method, entanglement between two SCBs was demonstrated spectroscopically and with ground state characterization.

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Authors and Affiliations

  1. Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA, 91109, USA

    Pierre M. Echternach

  2. Chalmers University of Technology, Microtechnology and Nanoscience, 412 96, Göteborg, Sweden

    J. F. Schneiderman & Per Delsing

  3. Department of Physics and Astronomy, University of Southern California, Los Angeles, CA, 90089-0484, USA

    Matthew D. Shaw

Authors
  1. Pierre M. Echternach
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  2. J. F. Schneiderman
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  3. Matthew D. Shaw
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  4. Per Delsing
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Correspondence to Pierre M. Echternach.

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Echternach, P.M., Schneiderman, J.F., Shaw, M.D. et al. Progress in the development of a single Cooper-pair box qubit. Quantum Inf Process 8, 183–198 (2009). https://doi.org/10.1007/s11128-009-0097-x

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  • DOI: https://doi.org/10.1007/s11128-009-0097-x

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