Josephson Array Mode Parametric Amplifier

ORAL

Abstract

We introduce a novel near-quantum-limited amplifier with a large tunable bandwidth and high dynamic range – the Josephson Array Mode Parametric Amplifier (JAMPA). The signal and idler modes involved in the amplification process are realized by the array modes of a chain of 1000 flux tunable, Josephson-junction-based, nonlinear elements. The frequency spacing between array modes is comparable to the flux tunability of the modes, ensuring that any desired frequency can be occupied by a resonant mode, which can further be pumped to produce high gain. We experimentally demonstrate that the device can be operated as a nearly quantum-limited parametric amplifier with 20dB of gain at almost any frequency within (4−12)GHz band. On average, it has a 3dB bandwidth of 11MHz and input 1dB compression power of −108dBm, which can go as high as −93dBm. We envision the application of such a device to the time- and frequency-multiplexed readout of multiple qubits, as well as to the generation of continuous-variable cluster states.

*This research is supported by: ARO, AFOSR, YINQE.

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Presenters

  • Volodymyr Sivak

    • Yale University

Authors

  • Volodymyr Sivak

    • Yale University

  • Shyam Shankar

    • Yale University

  • Gangqiang Liu

    • Applied Physics, Yale University
    • Yale University

  • Jose Aumentado

    • National Institute of Standards and Technology Boulder
    • National Institute of Standards and Technology
    • Physics Measurement Lab, National Institute of Standards and Technology

  • Michel H. Devoret

    • Yale University
    • Department of Applied Physics, Yale University
    • Applied Physics, Yale University