Non-local superconducting single-photon detector
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arXiv
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| Format: | Preprint |
| Published: |
2023
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| _version_ | 1866914758631882752 |
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| author | Paolucci, Federico |
| author_facet | Paolucci, Federico |
| contents | We present and theoretically analyse the performance of an innovative non-local superconducting single-photon detector. The device operates thanks to the energy-to-phase conversion mechanism, where the energy of the absorbed single-photon is transformed in a variation of the superconducting phase. To this scope, the detector is designed in the form of a double-loop superconductor/normal metal/superconductors (SNS) Josephson interferometer, where the detection occurs in a long SNS junction and the read-out is operated by a short SNS junction. The variation of the superconducting phase across the read-out junction is measured by recording the quasiparticle current flowing through a tunnel coupled superconducting probe. By exploiting realistic geometry and materials, the detector is able to reveal single-photons of frequency down to 10 GHz when operated at 10 mK. Furthermore, the device provides value of signal-to-noise ratio up 10^4 in the range 10 GHz-10 THz by selecting the magnetic flux and the bias voltage. This device can find direct applications as single-photon detector in both basic science and quantum technology, while the energy-to-phase conversion mechanism can be at the basis of non-local read-out and memory architectures for superconducting qubits. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2303_13928 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Non-local superconducting single-photon detector Paolucci, Federico Mesoscale and Nanoscale Physics Superconductivity We present and theoretically analyse the performance of an innovative non-local superconducting single-photon detector. The device operates thanks to the energy-to-phase conversion mechanism, where the energy of the absorbed single-photon is transformed in a variation of the superconducting phase. To this scope, the detector is designed in the form of a double-loop superconductor/normal metal/superconductors (SNS) Josephson interferometer, where the detection occurs in a long SNS junction and the read-out is operated by a short SNS junction. The variation of the superconducting phase across the read-out junction is measured by recording the quasiparticle current flowing through a tunnel coupled superconducting probe. By exploiting realistic geometry and materials, the detector is able to reveal single-photons of frequency down to 10 GHz when operated at 10 mK. Furthermore, the device provides value of signal-to-noise ratio up 10^4 in the range 10 GHz-10 THz by selecting the magnetic flux and the bias voltage. This device can find direct applications as single-photon detector in both basic science and quantum technology, while the energy-to-phase conversion mechanism can be at the basis of non-local read-out and memory architectures for superconducting qubits. |
| title | Non-local superconducting single-photon detector |
| topic | Mesoscale and Nanoscale Physics Superconductivity |
| url | https://arxiv.org/abs/2303.13928 |