TY - JOUR
T1 - Quantum Key Distillation from Gaussian States by Gaussian Operations
JF - Physical Review Letters
Y1 - 2005
A1 - Navascués, M.
A1 - Bae, J.
A1 - Cirac, J. Ignacio
A1 - Lewenstein, Maciej
A1 - Sanpera, Anna
A1 - Acín, Antonio
AB - 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.
PB - American Physical Society
VL - 94
UR - http://link.aps.org/doi/10.1103/PhysRevLett.94.010502
ER -