Two-mode squeezing in a broadband parametric amplifier

ORAL

Abstract

The Josephson traveling wave parametric amplifier (JTWPA) exhibits gains of greater than 20 dB over a frequency range of a few gigahertz. In addition to being a quantum-limited amplifier over a wide frequency range, the JTWPA is a source of broadband squeezed radiation. We report the observation of broadband squeezing of microwave light generated by a JTWPA by measuring cross correlations between modes separated by up to one gigahertz in frequency. Employing a chain of two JTWPAs, the first as a squeezer and the second as a quantum-limited preamplifier, ensures a high-efficiency measurement of squeezing. We also discuss progress towards employing such two-mode squeezed radiation to realize high-fidelity dispersive readout of superconducting qubits. \newline \newline This research was funded in part by the U.S. Army Research Office Grant No. W911NF-14-1-0682 and by the Office of the Director of National Intelligence (ODNI), Intelligence Advanced Research Projects Activity (IARPA) and by the Assistant Secretary of Defense for Research \& Engineering via MIT Lincoln Laboratory under Air Force Contract No. FA8721-05-C-0002.

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Authors

  • J. A. Grover

    • Research Laboratory of Electronics, MIT

  • A. Kamal

    • Research Laboratory of Electronics, MIT

  • S. Gustavsson

    • Research Laboratory of Electronics, MIT

  • F. Yan

    • Research Laboratory of Electronics, MIT

  • T. P. Orlando

    • Research Laboratory of Electronics, MIT

  • W. D. Oliver

    • Research Laboratory of Electronics, MIT

  • D. Hover

    • MIT Lincoln Laboratory

  • V. Bolkhovsky

    • MIT Lincoln Laboratory

  • J. L. Yoder

    • MIT Lincoln Laboratory

  • C. Macklin

    • University of California Berkeley

  • K. O'Brien

    • University of California Berkeley

  • I. Siddiqi

    • University of California Berkeley