Progress towards a broadband traveling wave Josephson parametric amplifier

ORAL

Abstract

Most Josephson parametric amplifiers are based on a resonant circuit architecture with associated bandwidth limitations. We examine the use of a `Josephson nonlinear fiber' -- a transmission line periodically loaded with Josephson junctions -- as an inherently broadband traveling wave parametric amplifier. We report on the device design, calculations of gain and bandwidth from a simple model, and preliminary measurement results. We acknowledge the ONR and the Hertz Foundation for financial support.

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Authors

  • D. H. Slichter

    • Quantum Nanoelectronics Lab, UC Berkeley
    • Quantum Nanoelectronics Laboratory, Dept. of Physics, UC Berkeley

  • Lafe Spietz

    • NIST Boulder

  • O. Naaman

    • Quantum Nanoelectronics Lab, UC Berkeley

  • J. Aumentado

    • NIST Boulder

  • I. Siddiqi

    • Quantum Nanoelectronics Lab, UC Berkeley