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arXiv 2606.02440quant-ph
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平面超导量子器件中的微波串扰

Microwave Crosstalk in Planar Superconducting Quantum Devices

ETH Zurich(苏黎世联邦理工学院);Paul Scherrer Institute(保罗谢勒研究所)

Yongxin Song, Dominic Hagmann, Kieran Dalton, Felix Henrich, Felix Wagner, Mohsen Bahrami Panah, Marek Pechal, Andreas Wallraff

AI总结:

本文通过识别导致强串扰的两种结构并建立定量物理模型,解释了平面超导量子器件中的微波串扰,为低串扰器件布局提供了设计指导。

摘要:

微波串扰对超导量子器件的规模化构成重大挑战,因为它会引入额外的控制误差。尽管已在各种实验环境中探索了其幅度和影响,但能够解释给定器件几何结构下测量到的串扰的定量物理模型仍然很少。在这里,我们通过研究带有交叉线的平面超导器件中的微波串扰来填补这一空白。我们识别出两种可能导致强串扰的结构:一条驱动线靠近另一个量子比特布线,以及一条驱动线使用空气桥跨越量子比特-量子比特耦合器。我们设计并表征了包含这些结构的器件,并开发了能够定量解释实验观察到的串扰的物理模型。基于这些模型,我们讨论了减少微波串扰的设计考虑。我们的结果为低串扰器件布局提供了实用指导,并为系统研究更弱的串扰机制奠定了基础。

英文摘要:

Microwave crosstalk poses a major challenge to scaling superconducting quantum devices as it introduces excess control errors. Although its magnitude and impact have been explored in various experimental settings, quantitative physical models capable of explaining measured crosstalk for a given device geometry remain scarce. Here, we address this gap by investigating microwave crosstalk in planar superconducting devices with crossovers. We identify two structures that can lead to strong crosstalk: a drive line routed in close proximity to another qubit, and a drive line crossing a qubit-qubit coupler using an air bridge. We design and characterize devices involving these structures and develop physical models that quantitatively explain the experimentally observed crosstalk. Based on these models, we discuss the design considerations for reducing microwave crosstalk. Our results provide practical guidance for low-crosstalk device layouts and establish a basis for the systematic investigation of weaker crosstalk mechanisms.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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