Flux-Pumped Double-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 amplifiers. However, in practice their performance is limited by higher-order corrections such as Kerr nonlinearity. In our work, we design a flux-pumped double-SQUID 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 single-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

Authors

  • KAGAN YANIK

    University of Rochester

  • Irwin Huang

    University of Rochester

  • Bibek Bhandari

    Institute for Quantum Studies, Chapman University, Chapman University

  • AHMED HAJR

    University of California, Berkeley

  • Bingcheng Qing

    University of California, Berkeley

  • Ke Wang

    University of California, Berkeley, UC Berkeley

  • Andrew N Jordan

    Chapman University

  • Justin G Dressel

    Chapman Univ, Chapman University

  • Irfan Siddiqi

    University of California, Berkeley