Improving the performance of twin-field quantum key distribution with advantage distillation technology
| Autor: | Li, Hong-Wei, Wang, Rui-Qiang, Zhang, Chun-Mei, Cai, Qing-Yu |
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| Rok vydání: | 2022 |
| Předmět: | |
| Zdroj: | Quantum 7, 1201 (2023) |
| Druh dokumentu: | Working Paper |
| DOI: | 10.22331/q-2023-12-06-1201 |
| Popis: | In this work, we apply the advantage distillation method to improve the performance of a practical twin-field quantum key distribution system under collective attack. Compared with the previous analysis result given by Maeda, Sasaki and Koashi [Nature Communication 10, 3140 (2019)], the maximal transmission distance obtained by our analysis method will be increased from 420 km to 470 km. By increasing the loss-independent misalignment error to 12%, the previous analysis method can not overcome the rate-distance bound. However, our analysis method can still overcome the rate-distance bound when the misalignment error is 16%. More surprisingly, we prove that twin-field quantum key distribution can generate positive secure key even if the misalignment error is close to 50%, thus our analysis method can significantly improve the performance of a practical twin-field quantum key distribution system. Comment: accepted by Quantum |
| Databáze: | arXiv |
| Externí odkaz: |
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