Experimental realization of ultra-high fidelity qubit operations with tunable fluxonium qubits

ORAL

Abstract

High-fidelity gates are critical for reducing the number of physical qubits required by quantum error correction. A main challenge for realizing high-fidelity gates is balancing controllability with coherence times. Fluxonium has reduced sensitivity to multiple noise sources, thereby exhibiting high coherence while maintaining large anharmonicity and strong coupling between circuits. These properties make fluxonium a promising qubit design for the next generation of superconducting quantum processors. However, due to its lower transition frequency, a fluxonium always stabilizes at a thermal state. Therefore, an active qubit reset needs to be implemented, in addition to a universal gate set. In this talk, we will demonstrate an efficient qubit reset and ultra-high fidelity single and two-qubit gates in a system with two coupled fluxonium qubits. The technologies demonstrated here are compatible with current methods for scaling up a multi-qubit system.

–

Presenters

  • 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

Authors

  • 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

  • Jin Qin

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

  • Hao Deng

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

  • Dawei Ding

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

  • Ran Gao

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

  • Xun Gao

    • 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

  • Xun Jiang

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

  • Zhisheng Li

    • Alibaba Quantum Laboratory Experimental Team, 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

  • Zhijun Song

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

  • Hantao Sun

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

  • Chengchun Tang

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

  • 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

  • Wenlong Yu

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

  • Tian Xia

    • Alibaba Quantum Laboratory Experimental Team, 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

  • Xiaohang Zhang

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

  • Jingwei Zhou

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

  • Xing Zhu

    • Alibaba Quantum Laboratory Experimental Team, 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

  • 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

  • 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