Implementation of quantum synchronization over a 20-km fiber distance based on frequency-correlated photon pairs and HOM interference
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arXiv
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| Autori principali: | , , , , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2021
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| _version_ | 1866911922916425728 |
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| author | Liu, Yuting Quan, Runai Xiang, Xiao Hong, Huibo Liu, Tao Dong, Ruifang Zhang, Shougang |
| author_facet | Liu, Yuting Quan, Runai Xiang, Xiao Hong, Huibo Liu, Tao Dong, Ruifang Zhang, Shougang |
| contents | The quantum synchronization based on frequency-correlated photon pairs and HOM interference has shown femtosecond-level precision and great application prospect in numerous fields depending on high-precision timefrequency signals. Due to the difficulty of achieving stable HOM interference fringe after long-distance fiber transmission, this quantum synchronization is hampered from long-haul field application. Utilizing segmented fibers instead of a single long-length fiber, we successfully achieved the stable observation of the two-photon interference of the lab-developed broadband frequency-correlated photon pairs after 20 km-long fiber transmission, without employing auxiliary phase stabilization method. Referenced to this interference fringe, the balance of the two fiber arms is successfully achieved with a long-term stability of 20 fs. The HOM-interference-based synchronization over a 20-km fiber link is thus demonstrated and a minimum stability of 74 fs has been reached at 48,000 s. This result not only provides a simple way to stabilize the fiber-optic two-photon interferometer for long-distance quantum communication systems, but also makes a great stride forward in extending the quantum-interference-based synchronization scheme to the long-haul field applications. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2106_13986 |
| institution | arXiv |
| publishDate | 2021 |
| record_format | arxiv |
| spellingShingle | Implementation of quantum synchronization over a 20-km fiber distance based on frequency-correlated photon pairs and HOM interference Liu, Yuting Quan, Runai Xiang, Xiao Hong, Huibo Liu, Tao Dong, Ruifang Zhang, Shougang Quantum Physics The quantum synchronization based on frequency-correlated photon pairs and HOM interference has shown femtosecond-level precision and great application prospect in numerous fields depending on high-precision timefrequency signals. Due to the difficulty of achieving stable HOM interference fringe after long-distance fiber transmission, this quantum synchronization is hampered from long-haul field application. Utilizing segmented fibers instead of a single long-length fiber, we successfully achieved the stable observation of the two-photon interference of the lab-developed broadband frequency-correlated photon pairs after 20 km-long fiber transmission, without employing auxiliary phase stabilization method. Referenced to this interference fringe, the balance of the two fiber arms is successfully achieved with a long-term stability of 20 fs. The HOM-interference-based synchronization over a 20-km fiber link is thus demonstrated and a minimum stability of 74 fs has been reached at 48,000 s. This result not only provides a simple way to stabilize the fiber-optic two-photon interferometer for long-distance quantum communication systems, but also makes a great stride forward in extending the quantum-interference-based synchronization scheme to the long-haul field applications. |
| title | Implementation of quantum synchronization over a 20-km fiber distance based on frequency-correlated photon pairs and HOM interference |
| topic | Quantum Physics |
| url | https://arxiv.org/abs/2106.13986 |