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arXiv 0802.4268cond-mat.supr-con
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超导共面波导谐振腔频率和噪声的温度特性

Temperature Dependence of the Frequency and Noise of Superconducting Coplanar Waveguide Resonators

Shwetank Kumar, Jiansong Gao, Jonas Zmuidzinas, Benjamin A. Mazin, Henry G. LeDuc, Peter K. Day

摘要:

我们目前的测量温度和功率的依赖性的超导铌薄膜共面波导谐振器的谐振频率和频率噪声,进行远低于超导转变(T_{c} =9.2 K)的温度。当温度从120 mK增加到1200 mK时,噪声降低了近两个数量级,而在此范围内,谐振频率随温度的变化与非晶半导体的标准二能级系统(TLS)模型一致.这些结果支持了TLS是超导微谐振器中噪声的原因的假设,并对量子比特和光子探测器等谐振器应用具有重要意义。

英文摘要:

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 TLS are responsible for the noise in superconducting microresonators, and have important implications for resonator applications such as qubits and photon detectors.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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