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Canceling microwave crosstalk with fixed-frequency qubits
Applied Physics Letters ( IF 4 ) Pub Date : 2022-04-26 , DOI: 10.1063/5.0088094 Wuerkaixi Nuerbolati 1 , Zhikun Han 2, 3, 4 , Ji Chu 2, 3, 4 , Yuxuan Zhou 2, 3, 4 , Xinsheng Tan 1 , Yang Yu 1 , Song Liu 2, 3, 4 , Fei Yan 2, 3, 4
Applied Physics Letters ( IF 4 ) Pub Date : 2022-04-26 , DOI: 10.1063/5.0088094 Wuerkaixi Nuerbolati 1 , Zhikun Han 2, 3, 4 , Ji Chu 2, 3, 4 , Yuxuan Zhou 2, 3, 4 , Xinsheng Tan 1 , Yang Yu 1 , Song Liu 2, 3, 4 , Fei Yan 2, 3, 4
Affiliation
Scalable quantum information processing requires that modular gate operations can be executed in parallel. The presence of crosstalk decreases the individual addressability, causing erroneous results during simultaneous operations. For superconducting qubits which operate in the microwave regime, electromagnetic isolation is often limited due to design constraints, leading to signal crosstalk that can deteriorate the quality of simultaneous gate operations. Here, we propose and demonstrate a method based on the alternative-current Stark effect for calibrating the microwave signal crosstalk. The method is suitable for processors based on fixed-frequency qubits, which are known for high coherence and simple control. The optimal compensation parameters can be reliably identified from a well-defined interference pattern. We implement the method on an array of seven superconducting qubits and show its effectiveness in removing the majority of crosstalk errors.
中文翻译:
用固定频率的量子比特消除微波串扰
可扩展的量子信息处理要求可以并行执行模块化门操作。串扰的存在降低了个体的可寻址性,导致同时操作期间的错误结果。对于在微波范围内运行的超导量子比特,由于设计限制,电磁隔离通常会受到限制,从而导致信号串扰,从而降低同步门操作的质量。在这里,我们提出并演示了一种基于交流斯塔克效应的方法来校准微波信号串扰。该方法适用于基于固定频率量子位的处理器,这些处理器以高相干性和简单控制着称。可以从定义明确的干涉图案中可靠地识别最佳补偿参数。
更新日期:2022-04-26
中文翻译:
用固定频率的量子比特消除微波串扰
可扩展的量子信息处理要求可以并行执行模块化门操作。串扰的存在降低了个体的可寻址性,导致同时操作期间的错误结果。对于在微波范围内运行的超导量子比特,由于设计限制,电磁隔离通常会受到限制,从而导致信号串扰,从而降低同步门操作的质量。在这里,我们提出并演示了一种基于交流斯塔克效应的方法来校准微波信号串扰。该方法适用于基于固定频率量子位的处理器,这些处理器以高相干性和简单控制着称。可以从定义明确的干涉图案中可靠地识别最佳补偿参数。