Abstract
The source flaw associated with the basis vector in the reference-frame-independent measurement-device-independent quantum key distribution (RFI-MDI-QKD) has not been systematically studied. As a result, it is often assumed that bit error is equal to phase error, which is not theoretically rigorous. Here, we propose a postprocessing method to estimate the phase error rate from the discarded mismatched-basis statistics, where the qubit source does not need to be characterized in detail. The source flaw in the basis vector of the RFI-MDI-QKD protocol can thus be corrected using this method. The numerical simulation results clearly demonstrate that the RFI-MDI-QKD protocol with uncharacterized sources is also insensitive to the misalignment of the reference frame.
© 2020 Optical Society of America
Full Article | PDF ArticleMore Like This
Donghwa Lee, Seongjin Hong, Young-Wook Cho, Hyang-Tag Lim, Sang-Wook Han, Hojoong Jung, Sung Moon, Kwang Jo Lee, and Yong-Su Kim
Opt. Lett. 45(9) 2624-2627 (2020)
Jian-Rong Zhu, Rong Wang, and Chun-Mei Zhang
Opt. Lett. 47(16) 4219-4222 (2022)
Chun-Mei Zhang, Wen-Bo Wang, Hong-Wei Li, and Qin Wang
Opt. Lett. 44(5) 1226-1229 (2019)