Intermodulation spectroscopy and the nonlinear response of two-level systems in superconducting coplanar-waveguide resonators

被引：1

作者：

Biznarova, Janka ^{[1
]}

Hernandez, J. C. Rivera ^{[2
]}

Forchheimer, Daniel ^{[3
]}

Bylander, Jonas ^{[1
]}

Haviland, David B. ^{[2
]}

Andersson, Gustav ^{[1
,4
]}

机构：

[1] Chalmers Univ Technol, Microtechnol & Nanosci, SE-41296 Gothenburg, Sweden

[2] KTH Royal Inst Technol, Dept Appl Phys, SE-10691 Stockholm, Sweden

[3] Intermodulat Prod AB, Segersta, Sweden

[4] Univ Chicago, Pritzker Sch Mol Engn, Chicago, IL 60637 USA

来源：

PHYSICAL REVIEW APPLIED | 2024年 / 22卷 / 01期

关键词：

Hydrostatic pressure - Quantum theory - Seebeck effect - Spectroscopic analysis - Superconducting resonators - Water vapor;

D O I：

10.1103/PhysRevApplied.22.014063

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Two-level system (TLS) loss typically limits the coherence of superconducting quantum circuits. The loss induced by TLS defects is nonlinear, resulting in quality factors with a strong dependence on the circulating microwave power. We observe frequency mixing due to this nonlinearity by applying a two-tone drive to a coplanar waveguide resonator and measuring the intermodulation products using a multifrequency lock-in technique. This intermodulation spectroscopy method provides an efficient approach to characterizing TLS loss in superconducting circuits. Using harmonic balance reconstruction, we recover the nonlinear parameters of the device-TLS interaction, which are in good agreement with the standard tunneling model for TLSs.

引用

页数：10

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