Security bound of continuous-variable quantum key distribution with noisy coherent states and channel
Quantum Physics
2015-05-13 v2
Abstract
Security of a continuous-variable quantum key distribution protocol based on noisy coherent states and channel is analyzed. Assuming the noise of coherent states is induced by Fred, a neutral party relative to others, we prove that the prepare and measurement scheme and entanglement-based scheme are equivalent. Then, we show that this protocol is secure against Gaussian collective attacks even if the channel is lossy and noisy, and further, a lower bound to the secure key rate is derived.
Cite
@article{arxiv.0904.1327,
title = {Security bound of continuous-variable quantum key distribution with noisy coherent states and channel},
author = {Yong Shen and Jian Yang and Hong Guo},
journal= {arXiv preprint arXiv:0904.1327},
year = {2015}
}
Comments
4 pages and 3 figures; Two references (ref. [1] and [2] in this new version) are added;