Passive polarization and phase stabilization scheme for Twin-Field QKD
Fuente:
arXiv
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| Autori principali: | , , |
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| Natura: | Preprint |
| Pubblicazione: |
2025
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| _version_ | 1866918079122898944 |
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| author | Nascimento, Christiano M. S. Calliari, Felipe Temporão, Guilherme P. |
| author_facet | Nascimento, Christiano M. S. Calliari, Felipe Temporão, Guilherme P. |
| contents | Twin-Field Quantum Key Distribution requires first-order interference between coherent states sent by Alice and Bob in a mid-station Charlie. In order to obtain stable operation and maximum interferometric visibility, not only phase stabilization but also polarization control is required, especially in optical-fiber setups. In this paper, we propose an experimental setup that simultaneously provides passive stabilization of phase and polarization fluctuations by combining a Sagnac-like interferometer with a "Plug-and-Play" configuration employing Faraday mirrors. Experimental results show a net interferometric visibility maintained around 95.3% during 72 hours of continuous operation, with a standard deviation of 0.47%. The setup can be straightforwardly adapted to a multi-user scenario employing either a star network, a bus topology, or a combination of both. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2507_01205 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Passive polarization and phase stabilization scheme for Twin-Field QKD Nascimento, Christiano M. S. Calliari, Felipe Temporão, Guilherme P. Quantum Physics Twin-Field Quantum Key Distribution requires first-order interference between coherent states sent by Alice and Bob in a mid-station Charlie. In order to obtain stable operation and maximum interferometric visibility, not only phase stabilization but also polarization control is required, especially in optical-fiber setups. In this paper, we propose an experimental setup that simultaneously provides passive stabilization of phase and polarization fluctuations by combining a Sagnac-like interferometer with a "Plug-and-Play" configuration employing Faraday mirrors. Experimental results show a net interferometric visibility maintained around 95.3% during 72 hours of continuous operation, with a standard deviation of 0.47%. The setup can be straightforwardly adapted to a multi-user scenario employing either a star network, a bus topology, or a combination of both. |
| title | Passive polarization and phase stabilization scheme for Twin-Field QKD |
| topic | Quantum Physics |
| url | https://arxiv.org/abs/2507.01205 |