Key distillation from Gaussian states by Gaussian operations

Preprint

20 May 2004

preprint
Published by arXiv in arXiv

https://doi.org/10.48550/arXiv.quant-ph/0405047

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

RECONCILIATION PROCESS
QUANTUM DISTILLATION
GAUSSIAN OPERATIONS
SECRECY PROPERTIES
KEY DISTILLATION
GAUSSIAN STATES
OPERATIONS
SECURE

All Related Versions

Version 1, 2004-05-11, ArXiv
Version 2, 2004-05-20, ArXiv
Published version: Physical Review Letters, 94 (1), 010502.

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