Improving the Performance of Practical Decoy-State Measurement-Device-Independent Quantum Key Distribution with Biased Basis Choice*

Supported by the National Key Research and Development Program of China under Grant Nos. 2018YFA0306400, 2017YFA0304100, the National Natural Science Foundation of China under Grants Nos. 61475197, 61590932, 11774180, 61705110, the Natural Science Foundation of the Jiangsu Higher Education Institutions under Grant Nos. 15KJA120002, 17KJB140016, the Outstanding Youth Project of Jiangsu Province through Grant No. BK20150039, the Natural Science Foundation of Jiangsu Province under Grant No. BK20170902, the Postgraduate Research and Practice Innovation Program of Jiangsu Province

Zhang Chun-Hui, Zhang Chun-Mei, Wang Qin
       

(Color online) Comparisons of the two-single-photon-pulse contributions between Xu et al.’s work and ours. (a) and (c) correspond to the results of using WCS, while (b) and (d) denote using HSPS. W1 (H1) refers to implementing Xu et al.’s three-intensity decoy-state method, and W2 (H2) represents applying our method. Here we reasonably set the number of pulses as N = 1011.