Title | Quantum Key Distillation from Gaussian States by Gaussian Operations |
Publication Type | Journal Article |
Year of Publication | 2005 |
Authors | Navascués, M, Bae, J, Cirac, IJ, Lewenstein, M, Sanpera, A, Acín, A |
Journal | Physical Review Letters |
Volume | 94 |
Issue | 1 |
Pagination | 010502 |
Date Published | 01/2005 |
ISSN | 0031-9007 |
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 nonpositive partial transposition. Moreover, all such states allow for key distillation, when Eve is assumed to perform finite-size coherent attacks before the reconciliation process. |
URL | http://link.aps.org/doi/10.1103/PhysRevLett.94.010502 |
DOI | 10.1103/PhysRevLett.94.010502 |
