Prefixed-Threshold Real-Time Selection for Free-Space Sending-or-Not Twin-Field Quantum Key Distribution
As a variant of the twin-field quantum key distribution (TF-QKD), the sending-or-not twin-field quantum key distribution (SNS TF-QKD) is famous for its higher tolerance of misalignment error, in addition to the capacity of surpassing the rate–distance limit. Importantly, the free-space SNS TF-QKD wi...
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| Format: | Article |
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MDPI AG
2022-02-01
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| Series: | Entropy |
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| Online Access: | https://www.mdpi.com/1099-4300/24/3/344 |
| _version_ | 1797471708052979712 |
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| author | Yang Yu Rui Xu Le Wang Qianping Mao Shengmei Zhao |
| author_facet | Yang Yu Rui Xu Le Wang Qianping Mao Shengmei Zhao |
| author_sort | Yang Yu |
| collection | DOAJ |
| description | As a variant of the twin-field quantum key distribution (TF-QKD), the sending-or-not twin-field quantum key distribution (SNS TF-QKD) is famous for its higher tolerance of misalignment error, in addition to the capacity of surpassing the rate–distance limit. Importantly, the free-space SNS TF-QKD will guarantee the security of the communications between mobile parties. In the paper, we first discuss the influence of atmospheric turbulence (AT) on the channel transmittance characterized by the probability distribution of the transmission coefficient (PDTC). Then, we present a method called prefixed-threshold real-time selection (P-RTS) to mitigate the interference of AT on the free-space SNS TF-QKD. The simulations of the free-space SNS TF-QKD with and without P-RTS are both given for comparison. The results showed that it is possible to share the secure key by using the free-space SNS TF-QKD. Simultaneously, the P-RTS method can make the free-space SNS TF-QKD achieve better and more stable performance at a short distance. |
| first_indexed | 2024-03-09T19:52:03Z |
| format | Article |
| id | doaj.art-3d58f3c92dbc48308f6bf3d57ae1fdb9 |
| institution | Directory Open Access Journal |
| issn | 1099-4300 |
| language | English |
| last_indexed | 2024-03-09T19:52:03Z |
| publishDate | 2022-02-01 |
| publisher | MDPI AG |
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| series | Entropy |
| spelling | doaj.art-3d58f3c92dbc48308f6bf3d57ae1fdb92023-11-24T01:07:03ZengMDPI AGEntropy1099-43002022-02-0124334410.3390/e24030344Prefixed-Threshold Real-Time Selection for Free-Space Sending-or-Not Twin-Field Quantum Key DistributionYang Yu0Rui Xu1Le Wang2Qianping Mao3Shengmei Zhao4Institute of Signal Processing Transmission, Nanjing University of Posts and Telecommunications (NUPT), Nanjing 210003, ChinaInstitute of Signal Processing Transmission, Nanjing University of Posts and Telecommunications (NUPT), Nanjing 210003, ChinaInstitute of Signal Processing Transmission, Nanjing University of Posts and Telecommunications (NUPT), Nanjing 210003, ChinaCollege of Computer Science and Technology, Nanjing Tech University, Nanjing 211816, ChinaInstitute of Signal Processing Transmission, Nanjing University of Posts and Telecommunications (NUPT), Nanjing 210003, ChinaAs a variant of the twin-field quantum key distribution (TF-QKD), the sending-or-not twin-field quantum key distribution (SNS TF-QKD) is famous for its higher tolerance of misalignment error, in addition to the capacity of surpassing the rate–distance limit. Importantly, the free-space SNS TF-QKD will guarantee the security of the communications between mobile parties. In the paper, we first discuss the influence of atmospheric turbulence (AT) on the channel transmittance characterized by the probability distribution of the transmission coefficient (PDTC). Then, we present a method called prefixed-threshold real-time selection (P-RTS) to mitigate the interference of AT on the free-space SNS TF-QKD. The simulations of the free-space SNS TF-QKD with and without P-RTS are both given for comparison. The results showed that it is possible to share the secure key by using the free-space SNS TF-QKD. Simultaneously, the P-RTS method can make the free-space SNS TF-QKD achieve better and more stable performance at a short distance.https://www.mdpi.com/1099-4300/24/3/344sending-or-not twin-field quantum key distributionfree-space quantum key distributionprefixed-threshold real-time selectionobservable model |
| spellingShingle | Yang Yu Rui Xu Le Wang Qianping Mao Shengmei Zhao Prefixed-Threshold Real-Time Selection for Free-Space Sending-or-Not Twin-Field Quantum Key Distribution Entropy sending-or-not twin-field quantum key distribution free-space quantum key distribution prefixed-threshold real-time selection observable model |
| title | Prefixed-Threshold Real-Time Selection for Free-Space Sending-or-Not Twin-Field Quantum Key Distribution |
| title_full | Prefixed-Threshold Real-Time Selection for Free-Space Sending-or-Not Twin-Field Quantum Key Distribution |
| title_fullStr | Prefixed-Threshold Real-Time Selection for Free-Space Sending-or-Not Twin-Field Quantum Key Distribution |
| title_full_unstemmed | Prefixed-Threshold Real-Time Selection for Free-Space Sending-or-Not Twin-Field Quantum Key Distribution |
| title_short | Prefixed-Threshold Real-Time Selection for Free-Space Sending-or-Not Twin-Field Quantum Key Distribution |
| title_sort | prefixed threshold real time selection for free space sending or not twin field quantum key distribution |
| topic | sending-or-not twin-field quantum key distribution free-space quantum key distribution prefixed-threshold real-time selection observable model |
| url | https://www.mdpi.com/1099-4300/24/3/344 |
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