Nonlinear mechanisms in Al and Ti superconducting travelling-wave parametric amplifiers
Nonlinear mechanisms in Al and Ti superconducting travelling-wave parametric amplifiers
复制标题
Al 和 Ti 超导行波参量放大器中的非线性机制
DOI：
10.1088/1361-6463/ac782e
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发表时间：
2022
期刊：
影响因子：
--
通讯作者：
Zhao S
中科院分区：
文献类型：
--
作者：
Zhao S
行波参量放大器（TWPA）工作背后的非线性机制在决定其性能（附加噪声、最大增益和带宽）方面非常重要。我们描述了一种方法，其耗散反应比和响应时间的基本微观过程中的超导材料的基本非线性的特征。我们描述和计算的不同行为所产生的平衡超导非线性，它具有低耗散和快速的响应时间，和非平衡加热非线性，它具有高耗散和缓慢的响应时间。我们已经制作了基于Al和Ti的TWPA，并使用我们的分析，其特征在于它们的非线性。对于Al和Ti，测得的耗散反应比和响应时间是定量相似的非平衡加热非线性的预测。我们能够获得超过
The underlying nonlinear mechanisms behind the operation of travelling-wave parametric amplifiers (TWPAs) are important in determining their performance in terms of added noise, maximum gain, and bandwidth. We describe a method of characterising the underlying nonlinearity of a superconducting material in terms of its dissipative-reactive ratio and the response time of the underlying microscopic processes. We describe and calculate the different behaviour arising from the equilibrium supercurrent nonlinearity, which has low dissipation and fast response time, and the non-equilibrium heating nonlinearity, which has high dissipation and slow response time. We have fabricated TWPAs based on Al and Ti, and characterised their nonlinearities using our analysis. For both Al and Ti, the measured dissipative-reactive ratios and response times are quantitatively similar to predictions for the non-equilibrium heating nonlinearity. We were able to obtain more than
影响因子：
1.9
作者：
A. Kher
通讯作者：
A. Kher
DOI：
10.31274/rtd-180813-13501
发表时间：
1997
期刊：
2018 IEEE International Symposium on Electromagnetic Compatibility and 2018 IEEE Asia-Pacific Symposium on Electromagnetic Compatibility (EMC/APEMC)
影响因子：
--
作者：
J. Mcdonald
通讯作者：
J. Mcdonald