Measurement-device-independent quantum key distribution (MDI-QKD), leaving the detection procedure to the third partner and thus being immune to all detector side-channel attacks, is very promising for the construction of high-security quantum information networks. We propose a scheme to implement MDI-QKD, but with continuous variables instead of discrete ones, i.e., with the source of Gaussian-modulated coherent states, based on the principle of continuous-variable entanglement swapping. This protocol not only can be implemented with current telecom components but also has high key rates compared to its discrete counterpart; thus it will be highly compatible with quantum networks.
@article{arxiv.1312.5025,
title = {Gaussian-modulated coherent-state measurement-device-independent quantum key distribution},
author = {Xiang-Chun Ma and Shi-Hai Sun and Mu-Sheng Jiang and Ming Gui and Lin-Mei Liang},
journal= {arXiv preprint arXiv:1312.5025},
year = {2014}
}
Comments
The analysis of asymmetric channel case has been included and an error of program used to plot Fig.4 has been corrected. 9 pages, 7 figures