{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,10,20]],"date-time":"2025-10-20T18:58:35Z","timestamp":1760986715768,"version":"build-2065373602"},"reference-count":29,"publisher":"MDPI AG","issue":"10","license":[{"start":{"date-parts":[[2022,10,13]],"date-time":"2022-10-13T00:00:00Z","timestamp":1665619200000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"Key-Area Research and Development Program of Guang-dong Province","award":["2018B030325002"],"award-info":[{"award-number":["2018B030325002"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Entropy"],"abstract":"<jats:p>Long block length rate-compatible low-density parity-compatible (LDPC) codes are designed to solve the problems of great variation of quantum channel noise and extremely low signal-to-noise ratio in continuous-variable quantum key distribution (CV-QKD). The existing rate-compatible methods for CV-QKD inevitably cost abundant hardware resources and waste secret key resources. In this paper, we propose a design rule of rate-compatible LDPC codes that can cover all potential SNRs with single check matrix. Based on this long block length LDPC code, we achieve high efficiency continuous-variable quantum key distribution information reconciliation with a reconciliation efficiency of 91.80% and we have higher hardware processing efficiency and lower frame error rate than other schemes. Our proposed LDPC code can obtain a high practical secret key rate and a long transmission distance in an extremely unstable channel.<\/jats:p>","DOI":"10.3390\/e24101463","type":"journal-article","created":{"date-parts":[[2022,10,13]],"date-time":"2022-10-13T20:55:11Z","timestamp":1665694511000},"page":"1463","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":7,"title":["Rate-Compatible LDPC Codes for Continuous-Variable Quantum Key Distribution in Wide Range of SNRs Regime"],"prefix":"10.3390","volume":"24","author":[{"given":"Xiaodong","family":"Fan","sequence":"first","affiliation":[{"name":"Laboratory of Nanophotonic Functional Materials and Devices, South China Normal University, Guangzhou 510006, China"},{"name":"Laboratory of Quantum Engineering and Quantum Materials, South China Normal University, Guangzhou 510006, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Quanhao","family":"Niu","sequence":"additional","affiliation":[{"name":"Laboratory of Nanophotonic Functional Materials and Devices, South China Normal University, Guangzhou 510006, China"},{"name":"Laboratory of Quantum Engineering and Quantum Materials, South China Normal University, Guangzhou 510006, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Tao","family":"Zhao","sequence":"additional","affiliation":[{"name":"Laboratory of Nanophotonic Functional Materials and Devices, South China Normal University, Guangzhou 510006, China"},{"name":"Laboratory of Quantum Engineering and Quantum Materials, South China Normal University, Guangzhou 510006, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-8855-6350","authenticated-orcid":false,"given":"Banghong","family":"Guo","sequence":"additional","affiliation":[{"name":"Laboratory of Nanophotonic Functional Materials and Devices, South China Normal University, Guangzhou 510006, China"},{"name":"Laboratory of Quantum Engineering and Quantum Materials, South China Normal University, Guangzhou 510006, China"},{"name":"National Quantum Communication (Guangdong) Co., Ltd., Guangzhou 510700, China"},{"name":"Key Laboratory of Quantum Information, University of Science and Technology of China, Chinese Academy of Sciences, Hefei 230026, China"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2022,10,13]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"145","DOI":"10.1103\/RevModPhys.74.145","article-title":"Quantum cryptography","volume":"74","author":"Gisin","year":"2001","journal-title":"Rev. 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