01086nas a2200205 4500008004100000022001400041245007300055210006900128260003900197300001100236490000700247520045700254100001800711700001100729700002200740700002300762700001800785700001900803856005800822 2005 eng d a0031-900700aQuantum Key Distillation from Gaussian States by Gaussian Operations0 aQuantum Key Distillation from Gaussian States by Gaussian Operat bAmerican Physical Societyc01/2005 a0105020 v943 aWe 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.1 aNavascués, M1 aBae, J1 aCirac, Ignacio, J1 aLewenstein, Maciej1 aSanpera, Anna1 aAcín, Antonio uhttp://link.aps.org/doi/10.1103/PhysRevLett.94.010502