High-fidelity entangling gates for fluxonium qubits

ORAL

Abstract

Fluxonium is the one of the promising candidates for the next generation of superconducting quantum processors due to its long coherence time and large anharmonicity. These qualities make it feasible to achieve ultra-high fidelity entangling gates. In this work, we theoretically analyze and compare various two-qubit gate schemes with all-microwave drives, as well as those with qubit frequency tuning, and numerically demonstrate how to obtain high fidelities. We will show further improvement of the gate fidelity by suppressing ZZ crosstalk and dephasing noise via dynamical decoupling with continuous drives. In addition, we will also discuss the many-body effect on two-qubit gates in multi-qubit devices.

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Presenters

  • Feng Wu

    • Alibaba Quantum Laboratory Experimental Team, Alibaba Quantum Laboratory, Alibaba Group
    • Alibaba Quantum Laboratory, Alibaba Group
    • Alibaba Quantum Laboratory
    • Alibaba Group, Alibaba Quantum Laboratory

Authors

  • Feng Wu

    • Alibaba Quantum Laboratory Experimental Team, Alibaba Quantum Laboratory, Alibaba Group
    • Alibaba Quantum Laboratory, Alibaba Group
    • Alibaba Quantum Laboratory
    • Alibaba Group, Alibaba Quantum Laboratory

  • Dawei Ding

    • Alibaba Quantum Laboratory, Alibaba Group
    • Alibaba Quantum Laboratory
    • Alibaba Group, Alibaba Quantum Laboratory

  • Tenghui Wang

    • Alibaba Quantum Laboratory Experimental Team, Alibaba Quantum Laboratory, Alibaba Group
    • Alibaba Quantum Laboratory, Alibaba Group
    • Alibaba Quantum Laboratory
    • Alibaba Group, Alibaba Quantum Laboratory

  • Xiaotong Ni

    • Alibaba Quantum Laboratory Experimental Team, Alibaba Quantum Laboratory, Alibaba Group
    • Alibaba Quantum Laboratory, Alibaba Group
    • Alibaba Group, Alibaba Quantum Laboratory

  • Hsiang-Sheng Ku

    • Alibaba Quantum Laboratory Experimental Team, Alibaba Quantum Laboratory, Alibaba Group
    • Alibaba Quantum Laboratory, Alibaba Group
    • Alibaba Quantum Laboratory
    • Alibaba Group, Alibaba Quantum Laboratory

  • Gengyan Zhang

    • Alibaba Quantum Laboratory Experimental Team, Alibaba Quantum Laboratory, Alibaba Group
    • Alibaba Quantum Laboratory, Alibaba Group
    • Alibaba Quantum Laboratory
    • Alibaba Group, Alibaba Quantum Laboratory

  • Additional Contributing AQL Members

    • Alibaba Quantum Laboratory, Alibaba Group

  • Yaoyun Shi

    • Alibaba Quantum Laboratory, Alibaba Group
    • Alibaba Quantum Laboratory
    • Alibaba Group, Alibaba Quantum Laboratory

  • Jianxin Chen

    • Alibaba Quantum Laboratory, Alibaba Group
    • Alibaba Quantum Laboratory
    • Alibaba Group, Alibaba Quantum Laboratory

  • Chunqing Deng

    • Alibaba Quantum Laboratory Experimental Team, Alibaba Quantum Laboratory, Alibaba Group
    • Alibaba Quantum Laboratory, Alibaba Group
    • Alibaba Quantum Laboratory
    • Alibaba Group, Alibaba Quantum Laboratory

  • Hui-Hai Zhao

    • Alibaba Quantum Laboratory Experimental Team, Alibaba Quantum Laboratory, Alibaba Group
    • Alibaba Quantum Laboratory, Alibaba Group
    • Alibaba Quantum Laboratory
    • Alibaba Group, Alibaba Quantum Laboratory