论文标题
多模声谐振器中的相关频率噪声
Correlated frequency noise in a multimode acoustic resonator
论文作者
论文摘要
频率不稳定性是量子设备中错误的主要来源。这项研究研究了表面声波（SAW）谐振器中的频率波动，在该谐振器（SAW）谐振器中，同时测量了14个SAW模式的反射系数超过7个小时。我们报告了两个不同的噪声特征。由与两级系统（TLS）缺陷相互作用引起的多模频噪声显示出显着的相关程度，随着增加的失调而减少。这一发现与当前对寄生虫行为的理解是量子设备中的主要噪声源之一。除了TLS诱导的噪声外，我们还观察到具有缓慢，反相关的动力学的强异常波动。这些噪声爆发类似于在超导量子系统中观察到的宇宙辐射的特征。
Frequency instabilities are a major source of errors in quantum devices. This study investigates frequency fluctuations in a surface acoustic wave (SAW) resonator, where reflection coefficients of 14 SAW modes are measured simultaneously for more than seven hours. We report two distinct noise characteristics. Multimode frequency noise caused by interactions with two-level system (TLS) defects shows significant degrees of correlations that diminish with increased detuning. This finding agrees with the current understanding of the parasitic TLS behavior as one of the dominant noise sources in quantum devices. In addition to the TLS-induced noise, we observe strong anomalous frequency fluctuations with slow, anti-correlated dynamics. These noise bursts resemble signatures of cosmic radiation observed in superconducting quantum systems.
