Simulating the effects of fabrication tolerance on the performance of Josephson travelling wave parametric amplifiers
Simulating the effects of fabrication tolerance on the performance of Josephson travelling wave parametric amplifiers
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DOI：
10.1088/1361-6668/acba4e
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发表时间：
2023-04-01
影响因子：
3.6
通讯作者：
Pashkin，Yu A.
中科院分区：
文献类型：
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作者：
Peatain，S. O.;Dixon，T.;Pashkin，Yu A.
我们模拟了基于一维射频单结超导量子干涉器件阵列的约瑟夫森行波参量放大器的性能。使用WRspice仿真平台和以前的工作，这个计划所允许的能力，我们包括在我们的研究中的放大器的增益上的器件参数的制造公差的影响。我们的模拟显示了参数变化的负面影响，以及由此产生的信号和泵浦波在单个单元之间的微波反射。我们提出了一种方法来了解内部动态的设备使用的阻抗模型，替代需要同时考虑相位偏置点和波混合动力学。这应该允许这里提出的结果应用到更复杂的计划，这承诺更高的放大和更少的缺点。我们强调在这些设备中的参数传播的严格限制，同时也讨论了该计划的缺陷的鲁棒性。
We present the simulated performance of a Josephson traveling wave parametric amplifier based on a one-dimensional array of radio-frequency single-junction superconducting quantum interference devices. Using the capabilities allowed by the WRspice simulation platform and previous works on this scheme, we include in our study the effects of fabrication tolerances in the device parameters on the gain of the amplifier. Our simulations show the negative effects of parameter variation and the resulting microwave reflections of signal and pump waves between individual cells. We present a method to understand the inner dynamics of the device using an impedance model that substitutes the need to simultaneously consider phase bias points and wave mixing dynamics. This should allow the application of the results presented here to more complex schemes, which promise higher amplification and fewer drawbacks. We highlight the strict limitations on parameter spread in these devices while also discussing the robustness of the scheme to defects.