2014/07/31 by Zhen-Qiang Yin, Chi-Hang Fred Fung, Xiongfeng Ma +6
Physics and Astronomy · #quant-ph
paper · pdf · doi:10.1103/physreva.90.052319
published as Phys. Rev. A 90, 052319 (2014) · Part of this article contains a significant improvement over arXiv:1309.3819
arxiv created 2014/11/27 · arxiv updated 2014/12/01
In the postprocessing of quantum key distribution, the raw key bits from the mismatched-basis measurements, where two parties use different bases, are normally discarded. Here, we propose a postprocessing method that exploits measurement statistics from mismatched-basis cases, and prove that incorporating these statistics enables uncharacterized qubit sources to be used in the measurement-device-independent quantum key distribution protocol and the Bennett-Brassard 1984 protocol, a case which is otherwise impossible.