Single Flux Quantum based electronics for control and readout of superconducting qubits.

ORAL

Abstract

Superconducting quantum information systems require a mix of continuous-wave AC, pulse-modulated AC, and DC signals for control and readout. There are significant advantages in terms of scaling, physical footprint, latency, signal integrity, and power consumption by moving these sources to 4 K or below, inside the cryostat. In this talk we present an experimental demonstration generating spectroscopy tones at 4 K to measure a transmon qubit’s energy level spacings at 100 mK. The spectroscopy tones are generated by a series of Josephson junctions at 4 K driven by a sigma-delta pulse stream from room temperature. This experiment was our first step in optimizing the Josephson arbitrary waveform synthesizer (JAWS) circuit for controlling quantum systems in a scalable manner. We also discuss further steps needed to generate pulsed signals for qubit preparation, cryogenic readout, and digital superconducting circuits at 4K for signal processing and feedback.

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Presenters

  • Manuel Castellanos-Beltran

    • National Institute of Standards and Technology Boulder

Authors

  • Manuel Castellanos-Beltran

    • National Institute of Standards and Technology Boulder

  • Adam J. Sirois

    • National Institute of Standards and Technology Boulder

  • Junling Long

    • NIST Boulder / CU Boulder
    • National Institute of Standards and Technology Boulder
    • University of Colorado Boulder
    • Physics, CU Boulder
    • Physics, University of Colorado-Boulder

  • Anna Fox

    • Superconductive Electronics Group, NIST
    • National Institute of Standards and Technology Boulder

  • Dan Schmidt

    • National Institute of Standards and Technology Boulder

  • Paul David Dresselhaus

    • National Institute of Standards and Technology Boulder

  • Peter F. Hopkins

    • National Institute of Standards and Technology Boulder

  • Joel N Ullom

    • National Institute of Standards and Technology
    • NIST
    • National Institute of Standards and Technology Boulder

  • David Pappas

    • NIST Boulder
    • National Institute of Standards and Technology Boulder
    • NIST
    • National Institute of Standards and Technology
    • National Institute of Standard and Technology Boulder
    • National Institute of Standards and Technology - Boulder

  • Samuel P Benz

    • National Institute of Standards and Technology
    • Superconductive Electronics Group, NIST
    • National Institute of Standards and Technology Boulder