TWPAC - the Traveling-Wave Parametric Amplifier and Converter: design and characterization

ORAL

Abstract

Superconducting traveling-wave parametric amplifiers (TWPAs) have become ubiquitous in superconducting circuit readout, owing their popularity to their large bandwidth, high gain, and near-quantum-limited operation. While TWPAs are in principle directional, non-idealities lead to pump, signal and idler reflections that can substantially raise the thermal occupancy of the readout cavity. As a consequence, several stages of lossy and magnetic isolators are often placed between the qubit system and the TWPA, degrading the noise performance and inhibiting scalability. To circumvent this issue, we consider a TWPA with forward gain and backward isolation, achieved by using two parametric processes: (i) parametric amplification in the forward direction, and (ii) frequency conversion in the backward direction. In this talk we will discuss experimental progress toward the design, fabrication and basic scattering characterization of this traveling-wave parametric amplifier and converter – or TWPAC.

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Presenters

  • Maxime Malnou

    National Institute of Standards and Technology, Boulder, National Institute of Standards and Technology

Authors

  • Maxime Malnou

    National Institute of Standards and Technology, Boulder, National Institute of Standards and Technology

  • Benton T Miller

    National Institute of Standards and Technology, Boulder, University of Colorado, Boulder

  • José A Estrada

    National Institute of Standards and Technology, Boulder

  • Katarina Cicak

    National Institute of Standards and Technology, Boulder, National Institute of Standards and Technology

  • Kristen L Genter

    National Institute of Standards and Technology, Boulder

  • John D Teufel

    National Institute of Standards and Technology, Boulder, National Institute of Standards and Technology Boulder

  • José Aumentado

    National Institute of Standards and Technology, Boulder, National Institute of Standards and Technology Boulder, National Institute of Standards and Technology, Quantum Circuits, Inc, Quantum Circuits, Inc.

  • Florent Lecocq

    National Institute of Standards and Technology Boulder, National Institute of Standards and Technology, Boulder, National Institute of Standards and Technology