Flux-Pumped Symmetrically Threaded SQUID Josephson Parametric Amplifier

ORAL

Abstract

Josephson parametric amplifiers (JPA) have many useful applications in superconducting qubit measurements and quantum feedback. Ideally, JPA's are supposed to perform as perfect quantum amplifiers. However, in practice their performance is limited by higher-order corrections such as Kerr nonlinearity. In our work, we design a flux-pumped symmetrically threaded SQUID (STS) JPA which allows us to eliminate the Kerr nonlinearity from the Hamiltonian. We find that this setup can yield a gain closer to the ideal Degenerate Parametric Amplifier gain compared to SQUID based flux-pumped JPA. We also investigate quadrature mixing as well as noise properties of the Kerr free amplifier.

*Research was sponsored by the Army Research Office and was accomplished under Grant Number W911NF-23-1-0323. The views and conclusions contained in this document are those of the authors and should not be interpreted as representing the official policies, either expressed or implied, of the Army Research Office or the U.S. Government.

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Presenters

  • KAGAN YANIK

    • University of Rochester
    • University of Rochester, Chapman University

Authors

  • KAGAN YANIK

    • University of Rochester
    • University of Rochester, Chapman University

  • Irwin Huang

    • University of Rochester

  • Bibek Bhandari

    • Chapman University

  • AHMED HAJR

    • University of California, Berkeley

  • Bingcheng Qing

    • University of California, Berkeley

  • Ke Wang

    • University of California, Berkeley

  • Justin Dressel

    • Chapman University

  • Irfan Siddiqi

    • University of California, Berkeley

  • Andrew N Jordan

    • Chapman University