Improved practical decoy state method in quantum key distribution with parametric down conversion source
Quantum Physics
2009-11-13 v1
Abstract
In this paper, a new decoy-state scheme for quantum key distribution with parametric down-conversion source is proposed. We use both three-intensity decoy states and their triggered and nontriggered components to estimate the fraction of single-photon counts and quantum bit-error rate of single-photon, and then deduce a more accurate value of key generation rate. The final key rate over transmission distance is simulated, which shows that we can obtain a higher key rate than that of the existing methods, including our own earlier work.
Keywords
Cite
@article{arxiv.quant-ph/0703252,
title = {Improved practical decoy state method in quantum key distribution with parametric down conversion source},
author = {Qin Wang and Xiang-Bin Wang and Gunnar Bjork and Anders Karlsson},
journal= {arXiv preprint arXiv:quant-ph/0703252},
year = {2009}
}
Comments
8 pages, 3 figures