Quantum key distillation from Gaussian states by Gaussian operations.
Phys Rev Lett
; 94(1): 010502, 2005 Jan 14.
Article
em En
| MEDLINE
| ID: mdl-15698055
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.
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01-internacional
Base de dados:
MEDLINE
Idioma:
En
Revista:
Phys Rev Lett
Ano de publicação:
2005
Tipo de documento:
Article
País de afiliação:
Espanha