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    Dynamical decoupling for superconducting qubits: A performance survey

    Nic Ezzell1,2,*, Bibek Pokharel1,2,†, Lina Tewala3,4,‡, Gregory Quiroz3,5,§, and Daniel A. Lidar1,2,6,7,¶

    • 1Department of Physics and Astronomy, University of Southern California, Los Angeles, California 90089, USA
    • 2Center for Quantum Information Science & Technology, University of Southern California, Los Angeles, California 90089, USA
    • 3Johns Hopkins University Applied Physics Laboratory, Laurel, Maryland 20723, USA
    • 4Thomas C. Jenkins Department of Biophysics, Johns Hopkins University Baltimore, Maryland 21218, USA
    • 5William H. Miller III Department of Physics & Astronomy, Johns Hopkins University, Baltimore, Maryland 21218, USA
    • 6Department of Electrical & Computer Engineering, University of Southern California, Los Angeles, California 90089, USA
    • 7Department of Chemistry, University of Southern California, Los Angeles, California 90089, USA

    • *nezzell@usc.edu
    • †pokharel@usc.edu
    • ‡lina.tewala@emory.edu
    • §gregory.quiroz@jhuapl.edu
    • lidar@usc.edu
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    Phys. Rev. Applied 20, 064027 – Published 14 December, 2023

    DOI: https://doi.org/10.1103/PhysRevApplied.20.064027

    Abstract

    Dynamical decoupling (DD) is perhaps the simplest and least resource-intensive error-suppression strategy for improving quantum computer performance. Here we report on a large-scale survey of the performance of 60 different DD sequences from ten families, including basic as well as advanced sequences with high-order error cancelation properties and built-in robustness. The survey is performed using three different superconducting-qubit IBMQ devices, with the goal of assessing the relative performance of the different sequences in the setting of arbitrary quantum state preservation. We find that the high-order universally robust (UR) and quadratic DD (QDD) sequences generally outperform all other sequences across devices and pulse-interval settings. Surprisingly, we find that DD performance for basic sequences such as the Carr-Purcell-Meiboom-Gill and XY4 sequences can be made to nearly match that of UR and QDD sequences by optimizing the pulse interval, with the optimal interval being substantially larger than the minimum interval possible on each device.

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    Phys. Rev. Applied 20, 064027– Published 14 December, 2023
    • Received 14 July 2022
    • Revised 3 May 2023
    • Accepted 16 November 2023
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