Josephson microwave photon detector operating at 0.7 K
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arXiv
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| Format: | Preprint |
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2024
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| _version_ | 1866912213781970944 |
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| author | Ladeynov, Dmitry A. Pankratov, Andrey L. Revin, Leonid S. Gordeeva, Anna V. Chiginev, Alexander V. Razov, Sergey A. Ilichev, Evgeny V. |
| author_facet | Ladeynov, Dmitry A. Pankratov, Andrey L. Revin, Leonid S. Gordeeva, Anna V. Chiginev, Alexander V. Razov, Sergey A. Ilichev, Evgeny V. |
| contents | We predict that the threshold detectors based on Al Josephson junctions, with critical currents below 100 nA, exhibiting a phase diffusion regime, can be exploited for the microwave photon detection both at 17 mK and 700 mK. We demonstrate a detection of two- and one-photon energies at 5 GHz with 90% and 15% efficiency and dark count time of about 0.1 s and 0.01 s, respectively. The observed weak temperature dependence of the detector's performance in the sub-kelvin range fully confirms its phase-diffusion mode of operation. On the other hand, these results show that inevitable thermal fluctuations are not the main source of the detector noise. Consequently, there is still a room to optimize the detector's performance. These results are important for axion search experiments in the range of 5-25 GHz (20-100 $μ$eV). |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2405_04426 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Josephson microwave photon detector operating at 0.7 K Ladeynov, Dmitry A. Pankratov, Andrey L. Revin, Leonid S. Gordeeva, Anna V. Chiginev, Alexander V. Razov, Sergey A. Ilichev, Evgeny V. Disordered Systems and Neural Networks Superconductivity Quantum Physics We predict that the threshold detectors based on Al Josephson junctions, with critical currents below 100 nA, exhibiting a phase diffusion regime, can be exploited for the microwave photon detection both at 17 mK and 700 mK. We demonstrate a detection of two- and one-photon energies at 5 GHz with 90% and 15% efficiency and dark count time of about 0.1 s and 0.01 s, respectively. The observed weak temperature dependence of the detector's performance in the sub-kelvin range fully confirms its phase-diffusion mode of operation. On the other hand, these results show that inevitable thermal fluctuations are not the main source of the detector noise. Consequently, there is still a room to optimize the detector's performance. These results are important for axion search experiments in the range of 5-25 GHz (20-100 $μ$eV). |
| title | Josephson microwave photon detector operating at 0.7 K |
| topic | Disordered Systems and Neural Networks Superconductivity Quantum Physics |
| url | https://arxiv.org/abs/2405.04426 |