Key distillation from Gaussian states by Gaussian operations
Quantum Physics
2012-04-30 v2
Abstract
We study the secrecy properties of Gaussian states under Gaussian operations. Although such operations are useless for quantum distillation, we prove that it is possible to distill a secret key secure against any attack from sufficiently entangled Gaussian states with non-positive partial transposition. Moreover, all such states allow for key distillation, when Eve is assumed to perform finite-size coherent attacks before the reconciliation process.
Keywords
Cite
@article{arxiv.quant-ph/0405047,
title = {Key distillation from Gaussian states by Gaussian operations},
author = {M. Navascues and J. Bae and J. I. Cirac and M. Lewenstein and A. Sanpera and A. Acin},
journal= {arXiv preprint arXiv:quant-ph/0405047},
year = {2012}
}
Comments
2 figures, REVTEX4