A challenge in building large-scale superconducting quantum processors is the precise control and manipulation of the qubit state. However, the crosstalk between the microwave control lines impedes the parallel execution of high-fidelity digital and analog quantum operations. Here, we propose and demonstrate a universal compensation protocol for calibrating the microwave signal crosstalk. We also introduce amplified error sequences to optimize accuracy. Furthermore, we show a definitive improvement in parallel gate operations with crosstalk cancellation, demonstrating the technique's effectiveness. This work paves the way for superconducting hardware that features the automated calibration of microwave crosstalk, leading to enhanced fidelities in multiqubit circuits.

中文翻译：

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用于校准超导电路中微波串扰的快速、通用方案


构建大规模超导量子处理器的一个挑战是量子位状态的精确控制和操纵。然而，微波控制线之间的串扰阻碍了高保真数字和模拟量子操作的并行执行。在这里，我们提出并演示了一种用于校准微波信号串扰的通用补偿协议。我们还引入了放大的错误序列以优化准确性。此外，我们还展示了具有串扰消除功能的并行门操作的明确改进，证明了该技术的有效性。这项工作为具有微波串扰自动校准功能的超导硬件铺平了道路，从而提高了多量子位电路的保真度。