Interface Piezoelectric Loss in Superconducting Qubits
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arXiv
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| Format: | Preprint |
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2026
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| author | Zhou, Haoxin Yu, Kangdi Balaji, Yashwanth Shirol, Sanjit Sementilli, Leo Zhang, Zi-Huai Schwartzberg, Adam Sipahigil, Alp |
| author_facet | Zhou, Haoxin Yu, Kangdi Balaji, Yashwanth Shirol, Sanjit Sementilli, Leo Zhang, Zi-Huai Schwartzberg, Adam Sipahigil, Alp |
| contents | Dissipation remains a central obstacle to improving superconducting quantum circuits, yet the microscopic origins of loss in widely used materials platforms are not fully understood. Here, we report the observation of interface piezoelectricity-induced dissipation in superconducting qubits fabricated on high-resistivity silicon. Our devices use a transmon qubit with a shunt capacitor that simultaneously serves as an interdigital transducer embedded in a surface acoustic wave resonator. By tuning the qubit transition into resonance with discrete mechanical modes, we observe up to a factor-of-two reduction in qubit lifetime, consistent with energy exchange between the qubit and mechanical modes mediated by piezoelectric coupling at the aluminum-silicon interface. Our findings provide direct evidence for interface piezoelectricity as a distinct loss channel in superconducting qubits. Combined with multiphysics simulations, these findings suggest that interface piezoelectric loss can dominate over loss from two-level systems at sufficiently high frequencies. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2605_15554 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Interface Piezoelectric Loss in Superconducting Qubits Zhou, Haoxin Yu, Kangdi Balaji, Yashwanth Shirol, Sanjit Sementilli, Leo Zhang, Zi-Huai Schwartzberg, Adam Sipahigil, Alp Quantum Physics Mesoscale and Nanoscale Physics Dissipation remains a central obstacle to improving superconducting quantum circuits, yet the microscopic origins of loss in widely used materials platforms are not fully understood. Here, we report the observation of interface piezoelectricity-induced dissipation in superconducting qubits fabricated on high-resistivity silicon. Our devices use a transmon qubit with a shunt capacitor that simultaneously serves as an interdigital transducer embedded in a surface acoustic wave resonator. By tuning the qubit transition into resonance with discrete mechanical modes, we observe up to a factor-of-two reduction in qubit lifetime, consistent with energy exchange between the qubit and mechanical modes mediated by piezoelectric coupling at the aluminum-silicon interface. Our findings provide direct evidence for interface piezoelectricity as a distinct loss channel in superconducting qubits. Combined with multiphysics simulations, these findings suggest that interface piezoelectric loss can dominate over loss from two-level systems at sufficiently high frequencies. |
| title | Interface Piezoelectric Loss in Superconducting Qubits |
| topic | Quantum Physics Mesoscale and Nanoscale Physics |
| url | https://arxiv.org/abs/2605.15554 |