Experimental Passive Decoy-State Quantum Key Distribution
Abstract
The decoy-state method is widely used in practical quantum key distribution systems to replace ideal single photon sources with realistic light sources by varying intensities. Instead of active modulation, the passive decoy-state method employs built-in decoy states in a parametric down-conversion photon source, which can decrease the side channel information leakage in decoy state preparation and hence increase the security. By employing low dark count up-conversion single photon detectors, we have experimentally demonstrated the passive decoy-state method over a 50-km-long optical fiber and have obtained a key rate of about 100 bit/s. Our result suggests that the passive decoy-state source is a practical candidate for future quantum communication implementation.
Cite
@article{arxiv.1405.3761,
title = {Experimental Passive Decoy-State Quantum Key Distribution},
author = {Qi-Chao Sun and Wei-Long Wang and Yang Liu and Fei Zhou and Jason S. Pelc and M. M. Fejer and Cheng-Zhi Peng and Xian-Feng Chen and Xiongfeng Ma and Qiang Zhang and Jian-Wei Pan},
journal= {arXiv preprint arXiv:1405.3761},
year = {2015}
}
Comments
14 pages, 5 figures