Intermodulation spectroscopy and the nonlinear response of two-level systems in superconducting coplanar waveguide resonators
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| Main Authors: | , , , , , |
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| Format: | Preprint |
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2024
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| _version_ | 1866910624639877120 |
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| author | Biznárová, Janka Hernández, J. C. Rivera Forchheimer, Daniel Bylander, Jonas Haviland, David B. Andersson, Gustav |
| author_facet | Biznárová, Janka Hernández, J. C. Rivera Forchheimer, Daniel Bylander, Jonas Haviland, David B. Andersson, Gustav |
| contents | Two-level system (TLS) loss is typically limiting 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 tunnelling model for TLSs. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2402_10775 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Intermodulation spectroscopy and the nonlinear response of two-level systems in superconducting coplanar waveguide resonators Biznárová, Janka Hernández, J. C. Rivera Forchheimer, Daniel Bylander, Jonas Haviland, David B. Andersson, Gustav Quantum Physics Superconductivity Two-level system (TLS) loss is typically limiting 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 tunnelling model for TLSs. |
| title | Intermodulation spectroscopy and the nonlinear response of two-level systems in superconducting coplanar waveguide resonators |
| topic | Quantum Physics Superconductivity |
| url | https://arxiv.org/abs/2402.10775 |