Quantum Key Distillation from Gaussian States by Gaussian Operations
Open Access
- 11 January 2005
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 94 (1) , 010502
- https://doi.org/10.1103/physrevlett.94.010502
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.Keywords
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