Gaussian Operations and Privacy
Quantum Physics
2012-04-30 v1
Abstract
We consider the possibilities offered by Gaussian states and operations for two honest parties, Alice and Bob, to obtain privacy against a third eavesdropping party, Eve. We first extend the security analysis of the protocol proposed in M. Navascues et al., Phys. Rev. Lett. 94, 010502 (2005). Then, we prove that a generalized version of this protocol does not allow to distill a secret key out of bound entangled Gaussian states.
Cite
@article{arxiv.quant-ph/0502010,
title = {Gaussian Operations and Privacy},
author = {Miguel Navascues and Antonio Acin},
journal= {arXiv preprint arXiv:quant-ph/0502010},
year = {2012}
}