Assessing the operating characteristics of an ion-milled phonon-mediated quantum parity detector
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arXiv
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| Auteurs principaux: | , , , , , , |
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| Format: | Preprint |
| Publié: |
2025
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| _version_ | 1866917453569720320 |
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| author | Sandoval, Brandon J. Beyer, Andrew D. Echternach, Pierre M. Golwala, Sunil R. Ho, William D. Yuan, Lanqing Ramanathan, Karthik |
| author_facet | Sandoval, Brandon J. Beyer, Andrew D. Echternach, Pierre M. Golwala, Sunil R. Ho, William D. Yuan, Lanqing Ramanathan, Karthik |
| contents | Phonon sensitive superconducting qubits promise to provide sub-eV energy deposit thresholds, useful for future rare-event experiments looking for interactions from dark matter and neutrinos. We detail here engineering results from a Quantum Parity Detector (QPDs), one of a class of phonon sensitive qubits, and, as a first measurement, show that this device has a quiescent quasiparticle density of $1.8 \pm 0.8 μ\mathrm{m}^{-3}$, in line with expectation. We also outline an argon ion-mill process for multi-step Josephson Junction fabrication, expanding the sparse literature on this topic, which proves useful in avoiding secondary parasitic junctions. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2509_18637 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Assessing the operating characteristics of an ion-milled phonon-mediated quantum parity detector Sandoval, Brandon J. Beyer, Andrew D. Echternach, Pierre M. Golwala, Sunil R. Ho, William D. Yuan, Lanqing Ramanathan, Karthik Instrumentation and Detectors Instrumentation and Methods for Astrophysics High Energy Physics - Experiment Quantum Physics Phonon sensitive superconducting qubits promise to provide sub-eV energy deposit thresholds, useful for future rare-event experiments looking for interactions from dark matter and neutrinos. We detail here engineering results from a Quantum Parity Detector (QPDs), one of a class of phonon sensitive qubits, and, as a first measurement, show that this device has a quiescent quasiparticle density of $1.8 \pm 0.8 μ\mathrm{m}^{-3}$, in line with expectation. We also outline an argon ion-mill process for multi-step Josephson Junction fabrication, expanding the sparse literature on this topic, which proves useful in avoiding secondary parasitic junctions. |
| title | Assessing the operating characteristics of an ion-milled phonon-mediated quantum parity detector |
| topic | Instrumentation and Detectors Instrumentation and Methods for Astrophysics High Energy Physics - Experiment Quantum Physics |
| url | https://arxiv.org/abs/2509.18637 |