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    • Digital control of a superconducting qubit using a Josephson pulse generator at 3 K

    Metadata Updated: March 14, 2025

    Included here are data used to generate figures from the paper "Digital control of a superconducting qubit using a Josephson pulse generator at 3 K".Abstract: Scaling of quantum computers to fault-tolerant levels relies critically on the integration of energy-efficient, stable, and reproducible qubit control and readout electronics. In comparison to traditional semiconductor control electronics (TSCE) located at room temperature, the signals generated by Josephson junction (JJ) based rf sources benefit from small device sizes, low power dissipation, intrinsic calibration, superior reproducibility, and insensitivity to ambient fluctuations. Previous experiments to co-locate qubits and JJ-based control electronics resulted in quasiparticle poisoning of the qubit; degrading the qubit's coherence and lifetime. In this paper, we digitally control a 0.01~K transmon qubit with pulses from a Josephson pulse generator (JPG) located at the 3~K stage of a dilution refrigerator. We directly compare the qubit lifetime $T_1$, coherence time $T_2^$, and thermal occupation $P_{th}$ when the qubit is controlled by the JPG circuit versus the TSCE setup. We find agreement to within the daily fluctuations on $\pm 0.5~\mu$s and $\pm 2~\mu$s for $T_1$ and $T_2^$, respectively, and agreement to within the 1\% error for $P_{th}$. Additionally, we perform randomized benchmarking to measure an average JPG gate error of $2.1 imes 10^{-2}$. In combination with a small device size ($<25$~mm$^2$) and low on-chip power dissipation ($\ll 100~\mu$W), these results are an important step towards demonstrating the viability of using JJ-based control electronics located at temperature stages higher than the mixing chamber stage in highly-scaled superconducting quantum information systems

    Access & Use Information

    Public: This dataset is intended for public access and use. License: See this page for license information.

    Downloads & Resources

    References

    https://arxiv.org/abs/2111.12778

    Dates

    Metadata Created Date June 22, 2022
    Metadata Updated Date March 14, 2025
    Data Update Frequency irregular

    Metadata Source

    Harvested from NIST

    Other Data Resources

    Additional Metadata

    Resource Type Dataset
    Metadata Created Date June 22, 2022
    Metadata Updated Date March 14, 2025
    Publisher National Institute of Standards and Technology
    Maintainer
    Identifier ark:/88434/mds2-2516
    Data First Published 2022-02-18
    Language en
    Data Last Modified 2021-11-26 00:00:00
    Category Standards:Reference instruments, Information Technology:Computational science, Electronics:Superconducting electronics, Physics:Quantum information science, Physics:Condensed matter, Metrology:Electrical/electromagnetic metrology
    Public Access Level public
    Data Update Frequency irregular
    Bureau Code 006:55
    Metadata Context https://project-open-data.cio.gov/v1.1/schema/data.json
    Schema Version https://project-open-data.cio.gov/v1.1/schema
    Catalog Describedby https://project-open-data.cio.gov/v1.1/schema/catalog.json
    Harvest Object Id 7b2532bb-fc53-4776-9da1-3787c6031836
    Harvest Source Id 74e175d9-66b3-4323-ac98-e2a90eeb93c0
    Harvest Source Title NIST
    Homepage URL https://data.nist.gov/od/id/mds2-2516
    License https://www.nist.gov/open/license
    Program Code 006:045
    Related Documents https://arxiv.org/abs/2111.12778
    Source Datajson Identifier True
    Source Hash 5cbabe9566ff0dacef33f74d407a2f62d09d645ca85fa2b0cef69ea0cd90a319
    Source Schema Version 1.1

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