Ultra-high-rate detection of entangled photon pairs
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arXiv
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| Auteurs principaux: | , , , , , , , |
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| Format: | Preprint |
| Publié: |
2025
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| _version_ | 1866918172647489536 |
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| author | Honjo, Toshimori Miyajima, Shigeyuki Miki, Shigehito Terai, Hirotaka Lo, Hsin-Pin Ikuta, Takuya Yonezu, Yuya Takesue, Hiroki |
| author_facet | Honjo, Toshimori Miyajima, Shigeyuki Miki, Shigehito Terai, Hirotaka Lo, Hsin-Pin Ikuta, Takuya Yonezu, Yuya Takesue, Hiroki |
| contents | The high-rate detection of entangled photons is essential for advancing photonic quantum information processing. Although several experimental demonstrations have been reported, the achievable coincidence rates have so far remained limited. One of the main bottlenecks arises from the dead time of single-photon detectors, which constrains coincidence detection at high photon-pair generation rates. In this work, we employ 16-pixel superconducting nanowire single-photon detectors (SNSPDs) to mitigate the impact of detector dead time. Consequently, we achieve coincidence rates exceeding 3 million counts per second (Mcps) in two-photon interference and CHSH inequality experiments using 5-GHz clocked sequential time-bin entangled photon pair source. To the best of our knowledge, this is the first demonstration of multi-Mcps coincidence detection of entangled photons, paving the way for high-speed entangled-photon-based quantum information processing. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2510_22894 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Ultra-high-rate detection of entangled photon pairs Honjo, Toshimori Miyajima, Shigeyuki Miki, Shigehito Terai, Hirotaka Lo, Hsin-Pin Ikuta, Takuya Yonezu, Yuya Takesue, Hiroki Quantum Physics The high-rate detection of entangled photons is essential for advancing photonic quantum information processing. Although several experimental demonstrations have been reported, the achievable coincidence rates have so far remained limited. One of the main bottlenecks arises from the dead time of single-photon detectors, which constrains coincidence detection at high photon-pair generation rates. In this work, we employ 16-pixel superconducting nanowire single-photon detectors (SNSPDs) to mitigate the impact of detector dead time. Consequently, we achieve coincidence rates exceeding 3 million counts per second (Mcps) in two-photon interference and CHSH inequality experiments using 5-GHz clocked sequential time-bin entangled photon pair source. To the best of our knowledge, this is the first demonstration of multi-Mcps coincidence detection of entangled photons, paving the way for high-speed entangled-photon-based quantum information processing. |
| title | Ultra-high-rate detection of entangled photon pairs |
| topic | Quantum Physics |
| url | https://arxiv.org/abs/2510.22894 |