Suppression of Fading Noise in Satellite-Mediated Continuous-Variable Quantum Key Distribution via Clusterization
The satellite-mediated continuous-variable quantum key distribution (CV-QKD) protocol, which relies on off-the-shelf telecommunication components, has the potential for a global quantum communication network with all-day operation. However, the transmittance fluctuation of satellite-mediated links l...
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MDPI AG
2023-08-01
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| Series: | Mathematics |
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| Online Access: | https://www.mdpi.com/2227-7390/11/16/3584 |
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| author | Zhiyue Zuo Wenqi Peng Hui Xian Wenqi Jiang Hao Luo Sha Xiong Ying Guo |
| author_facet | Zhiyue Zuo Wenqi Peng Hui Xian Wenqi Jiang Hao Luo Sha Xiong Ying Guo |
| author_sort | Zhiyue Zuo |
| collection | DOAJ |
| description | The satellite-mediated continuous-variable quantum key distribution (CV-QKD) protocol, which relies on off-the-shelf telecommunication components, has the potential for a global quantum communication network with all-day operation. However, the transmittance fluctuation of satellite-mediated links leads to the arriving quantum state showing non-Gaussian property, introducing extra fading noise in security analysis and limiting the secret key rate of the protocol. Here, we consider the clusterization method for data post-processing to suppress the fading noise in both downlink and uplink scenarios, where the measurement data are divided into several clusters, and we perform security analysis separately. In particular, we set the optimal upper and lower bounds of each cluster in terms of the probability distribution of transmittance (PDT), while finding an optimal cluster number for the trade-off between fading noise and the composable finite-size effect. Numerical analysis shows that the proposed method can improve the composable finite-size rate when the fading noise is large enough, even with only two clusters. Moreover, a high-speed CV-QKD system with a higher frequency of signal preparation and detection can extend the proposed method to work in the case of lower fading noise. |
| first_indexed | 2024-03-10T23:45:32Z |
| format | Article |
| id | doaj.art-553724559e204ee0ba95dad9a2633a03 |
| institution | Directory Open Access Journal |
| issn | 2227-7390 |
| language | English |
| last_indexed | 2024-03-10T23:45:32Z |
| publishDate | 2023-08-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Mathematics |
| spelling | doaj.art-553724559e204ee0ba95dad9a2633a032023-11-19T02:04:10ZengMDPI AGMathematics2227-73902023-08-011116358410.3390/math11163584Suppression of Fading Noise in Satellite-Mediated Continuous-Variable Quantum Key Distribution via ClusterizationZhiyue Zuo0Wenqi Peng1Hui Xian2Wenqi Jiang3Hao Luo4Sha Xiong5Ying Guo6School of Automation, Central South University, Changsha 410083, ChinaCollege of Physics and Information Engineering, Fuzhou University, Fuzhou 350108, ChinaSchool of Automation, Central South University, Changsha 410083, ChinaSchool of Automation, Central South University, Changsha 410083, ChinaSchool of Automation, Central South University, Changsha 410083, ChinaSchool of Automation, Central South University, Changsha 410083, ChinaSchool of Automation, Central South University, Changsha 410083, ChinaThe satellite-mediated continuous-variable quantum key distribution (CV-QKD) protocol, which relies on off-the-shelf telecommunication components, has the potential for a global quantum communication network with all-day operation. However, the transmittance fluctuation of satellite-mediated links leads to the arriving quantum state showing non-Gaussian property, introducing extra fading noise in security analysis and limiting the secret key rate of the protocol. Here, we consider the clusterization method for data post-processing to suppress the fading noise in both downlink and uplink scenarios, where the measurement data are divided into several clusters, and we perform security analysis separately. In particular, we set the optimal upper and lower bounds of each cluster in terms of the probability distribution of transmittance (PDT), while finding an optimal cluster number for the trade-off between fading noise and the composable finite-size effect. Numerical analysis shows that the proposed method can improve the composable finite-size rate when the fading noise is large enough, even with only two clusters. Moreover, a high-speed CV-QKD system with a higher frequency of signal preparation and detection can extend the proposed method to work in the case of lower fading noise.https://www.mdpi.com/2227-7390/11/16/3584clusterizationcontinuous-variable quantum key distributionfading noisesatellite |
| spellingShingle | Zhiyue Zuo Wenqi Peng Hui Xian Wenqi Jiang Hao Luo Sha Xiong Ying Guo Suppression of Fading Noise in Satellite-Mediated Continuous-Variable Quantum Key Distribution via Clusterization Mathematics clusterization continuous-variable quantum key distribution fading noise satellite |
| title | Suppression of Fading Noise in Satellite-Mediated Continuous-Variable Quantum Key Distribution via Clusterization |
| title_full | Suppression of Fading Noise in Satellite-Mediated Continuous-Variable Quantum Key Distribution via Clusterization |
| title_fullStr | Suppression of Fading Noise in Satellite-Mediated Continuous-Variable Quantum Key Distribution via Clusterization |
| title_full_unstemmed | Suppression of Fading Noise in Satellite-Mediated Continuous-Variable Quantum Key Distribution via Clusterization |
| title_short | Suppression of Fading Noise in Satellite-Mediated Continuous-Variable Quantum Key Distribution via Clusterization |
| title_sort | suppression of fading noise in satellite mediated continuous variable quantum key distribution via clusterization |
| topic | clusterization continuous-variable quantum key distribution fading noise satellite |
| url | https://www.mdpi.com/2227-7390/11/16/3584 |
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