Two-level system loss characterization of NbTi superconducting resonators on Si/SiO2 substrates
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arXiv
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| Autores principales: | , |
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| Formato: | Preprint |
| Publicado: |
2025
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| _version_ | 1866908512450248704 |
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| author | Kim, Bongkeon Doh, Yong-Joo |
| author_facet | Kim, Bongkeon Doh, Yong-Joo |
| contents | Superconducting coplanar waveguide (SCPW) resonators, key components for quantum computing and sensing applications, require a high internal quality factor (Qi) for effective qubit readout and quantum sensing applications. Minimizing two-level system (TLS) losses, particularly at material interfaces, is critical for gatemon and topological qubits operating at low temperatures and in high magnetic fields. NbTi, a superconducting alloy with a high upper critical field, enables SCPW resonators resilient to such conditions. We fabricated NbTi SCPW resonators on Si/SiO2 substrates and systematically characterized their TLS-limited quality factors as functions of temperature and microwave photon number. Our results demonstrate that NbTi-based SCPWs on Si/SiO2 substrates provide a promising platform for developing next-generation quantum circuits. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2509_01447 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Two-level system loss characterization of NbTi superconducting resonators on Si/SiO2 substrates Kim, Bongkeon Doh, Yong-Joo Superconductivity Mesoscale and Nanoscale Physics Superconducting coplanar waveguide (SCPW) resonators, key components for quantum computing and sensing applications, require a high internal quality factor (Qi) for effective qubit readout and quantum sensing applications. Minimizing two-level system (TLS) losses, particularly at material interfaces, is critical for gatemon and topological qubits operating at low temperatures and in high magnetic fields. NbTi, a superconducting alloy with a high upper critical field, enables SCPW resonators resilient to such conditions. We fabricated NbTi SCPW resonators on Si/SiO2 substrates and systematically characterized their TLS-limited quality factors as functions of temperature and microwave photon number. Our results demonstrate that NbTi-based SCPWs on Si/SiO2 substrates provide a promising platform for developing next-generation quantum circuits. |
| title | Two-level system loss characterization of NbTi superconducting resonators on Si/SiO2 substrates |
| topic | Superconductivity Mesoscale and Nanoscale Physics |
| url | https://arxiv.org/abs/2509.01447 |