报告时间：2024年9月29日上午10:30 (10:30, sept 29, 2024)
报告地点：物质楼a309会议室(rooma309 , material science building)
报告题目：realization of high-fidelity cz gate based on a double-transmon coupler
报告人：dr. rui li, post doctor, riken center for quantum computing (rqc)
报告摘要：
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 99.90% for a cz gate and 99.98% for single-qubit gates. the performance of the dtc scheme demonstrates its potential as a competitive building block for superconducting quantum processors.
