Source monitoring for continuous-variable quantum key distribution

Jian Yang; Xiang Peng; Hong Guo

doi:10.1103/PhysRevA.86.042314

Source monitoring for continuous-variable quantum key distribution

Quantum Physics 2015-06-03 v1

Authors: Jian Yang , Xiang Peng , Hong Guo

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Abstract

The noise in optical source needs to be characterized for the security of continuous-variable quantum key distribution (CVQKD). Two feasible schemes, based on either active optical switch or passive beamsplitter are proposed to monitor the variance of source noise, through which, Eve's knowledge can be properly estimated. We derive the security bounds for both schemes against collective attacks in the asymptotic case, and find that the passive scheme performs better.

Keywords

quantum key distribution

Cite

@article{arxiv.1112.4542,
  title  = {Source monitoring for continuous-variable quantum key distribution},
  author = {Jian Yang and Xiang Peng and Hong Guo},
  journal= {arXiv preprint arXiv:1112.4542},
  year   = {2015}
}

Comments

The first version. 9 pages and 4 figures

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