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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