On-chip integration of a superconducting microwave circulator and a Josephson parametric amplifier

ORAL

Abstract

Recent progress in microwave amplification based on parametric processes in superconducting circuits has revolutionized the measurement of feeble microwave signals. These devices, which operate near the quantum limit, are routinely used in ultralow temperature cryostats to: readout superconducting qubits, search for axionic dark matter, and characterize astrophysical sensors. However, these amplifiers often require ferrite circulators to separate incoming and outgoing traveling waves. For this reason, measurement efficiency and scalability are limited. In order to facilitate the routing of quantum signals we have created a superconducting, on-chip microwave circulator without permanent magnets. We integrate our circulator on-chip with a Josephson parametric amplifier for the purpose of near quantum-limited directional amplification. In this talk I will present a design overview and preliminary measurements.

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Authors

  • Eric Rosenthal

    • JILA, University of Colorado at Boulder

  • Benjamin J. Chapman

    • JILA, University of Colorado at Boulder

  • Bradley Moores

    • JILA, University of Colorado at Boulder

  • Joseph Kerckhoff

    • HRL Laboratories, LLC, Malibu, California

  • Maxime Malnou

    • JILA, University of Colorado at Boulder

  • Daniel Palken

    • JILA, University of Colorado at Boulder
    • JILA, Univ of Colorado - Boulder

  • J. A. B. Mates

    • National Institute of Standards and Technology, Boulder, Colorado

  • G. C. Hilton

    • National Institute of Standards and Technology, Boulder, Colorado

  • L. R. Vale

    • National Institute of Standards and Technology, Boulder, Colorado

  • J. N. Ullom

    • National Institute of Standards and Technology, Boulder, Colorado

  • Konrad Lehnert

    • JILA, National Institute of Standards and Technology and University of Colorado, Boulder, Colorado
    • JILA, Univ of Colorado - Boulder
    • JILA and Department of Physics, University of Colorado and NIST
    • JILA and the Dept. of Physics, University of Colorado and NIST