Die Separation for Mitigation of Phonon Bursts in Superconducting Circuits
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arXiv
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| Main Authors: | , , , |
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| Format: | Preprint |
| Published: |
2025
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| _version_ | 1866915297890402304 |
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| author | Moshel, Guy Rabinowitz, Omer Blumenthal, Eliya Hacohen-Gourgy, Shay |
| author_facet | Moshel, Guy Rabinowitz, Omer Blumenthal, Eliya Hacohen-Gourgy, Shay |
| contents | Cosmic rays and background radioactive decay can deposit significant energy into superconducting quantum circuits on planar chips. This energy converts into pair-breaking phonons that travel across the substrate and generate quasiparticles, leading to correlated energy and phase errors in nearby qubits. To mitigate this, we fabricated two separate dies and placed them adjacently without a galvanic connection between them. This blocks phonon propagation from one die to the other. Using microwave kinetic inductance detectors on both dies, we successfully detected high-energy bursts and conclusively demonstrated the blocking effect. However, we also observed simultaneous events in both dies, likely from a single cosmic particle traversing both dies. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2505_16272 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Die Separation for Mitigation of Phonon Bursts in Superconducting Circuits Moshel, Guy Rabinowitz, Omer Blumenthal, Eliya Hacohen-Gourgy, Shay Quantum Physics Instrumentation and Detectors Cosmic rays and background radioactive decay can deposit significant energy into superconducting quantum circuits on planar chips. This energy converts into pair-breaking phonons that travel across the substrate and generate quasiparticles, leading to correlated energy and phase errors in nearby qubits. To mitigate this, we fabricated two separate dies and placed them adjacently without a galvanic connection between them. This blocks phonon propagation from one die to the other. Using microwave kinetic inductance detectors on both dies, we successfully detected high-energy bursts and conclusively demonstrated the blocking effect. However, we also observed simultaneous events in both dies, likely from a single cosmic particle traversing both dies. |
| title | Die Separation for Mitigation of Phonon Bursts in Superconducting Circuits |
| topic | Quantum Physics Instrumentation and Detectors |
| url | https://arxiv.org/abs/2505.16272 |