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Phase-preserving amplification near the quantum limit with a Josephson ring modulator

Author

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  • N. Bergeal

    (Yale University, New Haven, Connecticut 06520-8284 USA
    LPEM-UPR5, CNRS, ESPCI ParisTech, 10 Rue Vauquelin, 75005 Paris, France)

  • F. Schackert

    (Yale University, New Haven, Connecticut 06520-8284 USA)

  • M. Metcalfe

    (Yale University, New Haven, Connecticut 06520-8284 USA
    The Joint Quantum Institute, University of Maryland, College Park, Maryland 20742, USA)

  • R. Vijay

    (Yale University, New Haven, Connecticut 06520-8284 USA
    University of California, Berkeley, California 94720-7300, USA)

  • V. E. Manucharyan

    (Yale University, New Haven, Connecticut 06520-8284 USA)

  • L. Frunzio

    (Yale University, New Haven, Connecticut 06520-8284 USA)

  • D. E. Prober

    (Yale University, New Haven, Connecticut 06520-8284 USA)

  • R. J. Schoelkopf

    (Yale University, New Haven, Connecticut 06520-8284 USA)

  • S. M. Girvin

    (Yale University, New Haven, Connecticut 06520-8284 USA)

  • M. H. Devoret

    (Yale University, New Haven, Connecticut 06520-8284 USA)

Abstract

Quantum electronics: noise abatement The processing of the single-quantum-level signals produced by current nanoscale solid-state devices such as qubits and nanomechanical resonators would require the development of very sensitive active circuits, such as amplifiers or frequency up- and down-converters that could attain the ultimate performances limited by the laws of quantum mechanics, while remaining of practical use. Bergeal et al. now demonstrate a phase-preserving, superconducting parametric amplifier with ultra-low noise properties, following theoretical principles recently presented in Nature Physics ( http://go.nature.com/F7lwR2 ). Based on a Josephson ring modulator, the new device can operate within a factor of three of the quantum limit. Possible applications include quantum analog signal processing such as the production of entangled microwave signal pairs.

Suggested Citation

  • N. Bergeal & F. Schackert & M. Metcalfe & R. Vijay & V. E. Manucharyan & L. Frunzio & D. E. Prober & R. J. Schoelkopf & S. M. Girvin & M. H. Devoret, 2010. "Phase-preserving amplification near the quantum limit with a Josephson ring modulator," Nature, Nature, vol. 465(7294), pages 64-68, May.
    • Handle: RePEc:nat:nature:v:465:y:2010:i:7294:d:10.1038_nature09035
    DOI: 10.1038/nature09035
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