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Effect of microwaves on superconductors for kinetic inductance detection and parametric amplification
Physical Review Applied ( IF 4.532 ) Pub Date : 
A. V. Semenov, I. A. Devyatov, M. P. Westig, and T. M. Klapwijk

We address, using concepts of the microscopic theory of superconductivity, parametric amplifiers and kinetic inductance detectors focusing on the interaction of microwave radiation with the superconducting condensate. This interaction was identified, in recent experiments, as the source of the apparent dissipation in microwave superconducting micro-resonators at low temperatures. Since the evaluation of the performance of practical devices based only on the change in kinetic inductance is not sufficiently informative about the underlying physical processes, we design an experiment with a tunnel-measurement of a microwave-driven superconducting wire, in which the tunnel-process is not affected by the microwaves. We conclude that such an experiment is feasible with the current technology, unfortunately difficult to incorporate in standard superconducting resonators optimized for applied performance. Nevertheless, given the limits of the commonly used phenomenological theories, such an experiment will provide the groundwork for further optimisation of the performance.
更新日期:2020-01-16

 

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