Key distillation from Gaussian states by Gaussian operations

M. Navascues, J. Bae, J. I. Cirac, M. Lewenstein, A. Sanpera, A. Acin

Research output: Contribution to journalArticle (Academic Journal)peer-review

17 Citations (Scopus)


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.
Original languageUndefined/Unknown
JournalPhysical Review Letters
Publication statusPublished - 11 May 2004

Bibliographical note

2 figures, REVTEX4


  • quant-ph

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