{"title":"Optimal temporal filtering for COW-QKD","authors":"G. Shaw, Shyam Sridharan, A. Prabhakar","doi":"10.1109/SPCOM55316.2022.9840768","DOIUrl":null,"url":null,"abstract":"We present a procedure to optimize the quantum bit error rate in coherent one-way quantum key distribution (COW-QKD) system. We built the testbed for COW-QKD, which supported a clock rate of 1 GHz. Temporal filtering was realized by varying gate delays applied to the single-photon detector and optimal selection of time window to receive logic bits. We observed that with adjustable temporal-filtering, we can improve on the quantum bit error rate, reducing it to 11.6%. The sifted key rate drops to less than 1 kbps, when we extend this QKD protocol over a distance of 150 km.","PeriodicalId":246982,"journal":{"name":"2022 IEEE International Conference on Signal Processing and Communications (SPCOM)","volume":"54 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"2022-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"3","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"2022 IEEE International Conference on Signal Processing and Communications (SPCOM)","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/SPCOM55316.2022.9840768","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 3
Abstract
We present a procedure to optimize the quantum bit error rate in coherent one-way quantum key distribution (COW-QKD) system. We built the testbed for COW-QKD, which supported a clock rate of 1 GHz. Temporal filtering was realized by varying gate delays applied to the single-photon detector and optimal selection of time window to receive logic bits. We observed that with adjustable temporal-filtering, we can improve on the quantum bit error rate, reducing it to 11.6%. The sifted key rate drops to less than 1 kbps, when we extend this QKD protocol over a distance of 150 km.
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