Temperature dependence of the frequency and noise of superconducting coplanar waveguide resonators

被引：65

作者：

Kumar, Shwetank ^{[1
]}

Gao, Jiansong ^{[1
]}

Zmuidzinas, Jonas ^{[1
]}

Mazin, Benjamin A. ^{[1
]}

LeDuc, Henry G. ^{[2
]}

Day, Peter K. ^{[2
]}

机构：

[1] CALTECH, Div Phys Math & Astron, Pasadena, CA 91125 USA

[2] CALTECH, Jet Prop Lab, Pasadena, CA 91109 USA

来源：

APPLIED PHYSICS LETTERS | 2008年 / 92卷 / 12期

关键词：

D O I：

10.1063/1.2894584

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We present measurements of the temperature and power dependence of the resonance frequency and frequency noise of superconducting niobium thin-film coplanar waveguide resonators carried out at temperatures well below the superconducting transition (T-c=9.2 K). The noise decreases by nearly two orders of magnitude as the temperature is increased from 120 to 1200 mK, while the variation of the resonance frequency with temperature over this range agrees well with the standard two-level system (TLS) model for amorphous dielectrics. These results support the hypothesis that TLSs are responsible for the noise in superconducting microresonators and have important implications for resonator applications such as qubits and photon detectors. (C) 2008 American Institute of Physics.

引用

页数：3

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