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Parameter optimization is a crucial step in achieving optimal performance in practical QKD systems. In general, such optimization is implemented using a local search algorithm (LSA). However, LSAs inevitably fail to find out the optimal values when the searched key rate function is nonconvex or has a discontinuity of first-order derivatives and a narrow parameter search space. This paper proposes a genetic algorithm-based method to overcome the limitations of LSAs for QKD parameter optimization. We tested the proposed method with various types of common QKD protocols and found that it has very high parameter optimization performance for QKD with a time consumption comparable to that using a standard LSA. We expect our method to be a valuable optimization tool for quantum information processing tasks.<\/jats:p>","DOI":"10.1155\/2022\/9717591","type":"journal-article","created":{"date-parts":[[2022,2,5]],"date-time":"2022-02-05T01:35:09Z","timestamp":1644024909000},"page":"1-9","source":"Crossref","is-referenced-by-count":34,"title":["Improving Parameter Optimization in Decoy-State Quantum Key Distribution"],"prefix":"10.1155","volume":"2022","author":[{"given":"Zijian","family":"Li","sequence":"first","affiliation":[{"name":"Guangxi Key Laboratory for Relativistic Astrophysics, School of Physical Science and Technology, Guangxi University, Nanning 530004, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-9000-7681","authenticated-orcid":true,"given":"Kejin","family":"Wei","sequence":"additional","affiliation":[{"name":"Guangxi Key Laboratory for Relativistic Astrophysics, School of Physical Science and Technology, Guangxi University, Nanning 530004, China"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"311","reference":[{"key":"1","article-title":"Quantum cryptography: public key distribution and coin tossing","author":"C. 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