Broadband CPW-based Impedance-transformed Josephson Parametric Amplifier

ORAL

Abstract

Josephson Parametric Amplifiers (JPAs), known for their near quantum limit noise performance, play a pivotal role in the measurement of superconducting qubits. With the growing demand in the field of advanced multi-qubit systems, the need for JPAs with wide bandwidth and extended dynamic range becomes imperative. In this work, we introduce a straightforward yet effective wideband impedance matched JPA design that integrates a tapered coplanar waveguide transmission line. Our proposed amplifier exhibits remarkable quantum-limited noise performance over a bandwidth of 700 MHz (200 MHz) with a gain exceeding 15 dB (20 dB). By modulating the external magnetic flux, we achieve a flux-tunable bandwidth greater than 1.4 GHz, while maintaining quantum-limited noise characteristics. The amplification performance, along with the device's reliability and concise design, ensure its versatile application in quantum computing, quantum communication and quantum sensing.

* This work was supported by Anyon Computing Inc, the Quantum Testbed Program of the Advanced Scientific Computing Research Division and Office of Science of the U.S. Department of Energy under Contract No. DE-AC02-05CH11231.

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Presenters

  • Xinyu Liu

    Anyon Computing Inc.

Authors

  • Xinyu Liu

    Anyon Computing Inc.

  • Hengjiang Ren

    Anyon Computing Inc.

  • Jie Luo

    Anyon Computing Inc.

  • Bingcheng Qing

    University of California, Berkeley

  • Long B Nguyen

    University of California, Berkeley, UC Berkeley

  • William P Livingston

    University of California, Berkeley

  • Noah Goss

    University of California Berkeley, University of California, Berkeley

  • AHMED HAJR

    University of California, Berkeley

  • Trevor Chistolini

    University of California, Berkeley

  • Zahra Pedramrazi

    University of California, Berkeley

  • David I Santiago

    Lawrence Berkeley National Laboratory

  • Irfan Siddiqi

    University of California, Berkeley