Slow noise processes in superconducting resonators

被引：23

作者：

Burnett, J. ^{[1
,2
]}

Lindstroem, T. ^{[1
]}

Oxborrow, M. ^{[1
]}

Harada, Y. ^{[3
]}

Sekine, Y. ^{[3
]}

Meeson, P. ^{[2
]}

Tzalenchuk, A. Ya. ^{[1
]}

机构：

[1] Natl Phys Lab, Teddington TW11 0LW, Middx, England

[2] Univ London, Egham TW20 0EX, Surrey, England

[3] NTT Basic Res Labs, Atsugi, Kanagawa 2430198, Japan

来源：

PHYSICAL REVIEW B | 2013年 / 87卷 / 14期

基金：

英国工程与自然科学研究理事会;

关键词：

D O I：

10.1103/PhysRevB.87.140501

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Slow noise processes, with characteristic timescales similar to 1 s, have been studied in planar superconducting resonators. A frequency-locked loop is employed to track deviations of the resonator center frequency with high precision and bandwidth. Comparative measurements are made in varying microwave drive and temperature, and between bare resonators and those with an additional dielectric layer. All resonators are found to exhibit flicker frequency noise which increases with decreasing microwave drive. We also show that an increase in temperature results in a saturation of flicker noise in resonators with an additional dielectric layer, while bare resonators stop exhibiting flicker noise, instead showing a random frequency walk process. DOI: 10.1103/PhysRevB.87.140501

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页数：5

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