RQC Seminar

111st RQC Seminar

  • Speaker

    Dr. Rui Li
    ( RQC, Superconducting Quantum Electronics Research Team )

  • Date

    16:00-17:00, April 10, 2024 (Wednesday)

  • Venue

    Hybrid(ZOOM・ Wako Welfare & Conf. 2F Large Meeting Room C61)

  • Title

    Realization of high-fidelity CZ gate based on a double-transmon coupler

  • Inquiries


Striving for higher gate fidelity is crucial not only for enhancing existing noisy intermediate-scale quantum (NISQ) devices but also for unleashing the potential of fault-tolerant quantum computation through quantum error correction. A recently proposed theoretical scheme, the double-transmon coupler (DTC), aims to achieve both suppressed residual interaction and a fast high-fidelity two-qubit gate simultaneously, particularly for highly detuned qubits. Harnessing the state-of-the-art fabrication techniques and a model-free pulse-optimization process based on reinforcement learning, we translate the theoretical DTC scheme into reality, attaining fidelities of 99.92% for a CZ gate and 99.98% for single-qubit gates.

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