Search results for: MULTIPARTITE DISTILLABLE KEY - Bridge of Knowledge

Search

Search results for: MULTIPARTITE DISTILLABLE KEY

Best results in : Research Potential Pokaż wszystkie wyniki (97)

Search results for: MULTIPARTITE DISTILLABLE KEY

Best results in : Business Offer Pokaż wszystkie wyniki (26)

Search results for: MULTIPARTITE DISTILLABLE KEY

Other results Pokaż wszystkie wyniki (1165)

Search results for: MULTIPARTITE DISTILLABLE KEY

  • Multipartite secret key distillation and bound entanglement

    Publication

    Recently it has been shown that quantum cryptography beyond pure entanglement distillation is possible and a paradigm for the associated protocols has been established. Here we systematically generalize the whole paradigm to the multipartite scenario. We provide constructions of new classes of multipartite bound entangled states, i.e., those with underlying twisted Greenberger-Horne-Zeilinger (GHZ) structure and nonzero distillable...

    Full text available to download

  • Low-dimensional bound entanglement with one-way distillable cryptographic key

    Publication

    - IEEE TRANSACTIONS ON INFORMATION THEORY - Year 2008

    In this paper, we provide a class of bound entangled states that have positive distillable secure key rate. The smallest state of this kind is 4 circle times 4, which shows that peculiar security contained in bound entangled states does not need high-dimensional systems. We show that for these states a positive key rate can be obtained by one-way Devetak-Winter (DW) protocol. Subsequently, the volume of bound entangled key-distillable...

  • Squashed entanglement for multipartite states and entanglement measures based on the mixed convex roof

    Publication
    • D. Yang
    • K. Horodecki
    • M. Horodecki
    • P. Horodecki
    • J. Oppenheim
    • W. Song

    - IEEE TRANSACTIONS ON INFORMATION THEORY - Year 2009

    New measures of multipartite entanglement are constructedbased on two definitions of multipartite information anddifferent methods of optimizing over extensions of the states. Oneis a generalization of the squashed entanglement where one takesthe mutual information of parties conditioned on the state's extensionand takes the infimum over such extensions. Additivity ofthe multipartite squashed entanglement is proved for both versionsof...

    Full text to download in external service

  • All Nonclassical Correlations Can Be Activated into Distillable Entanglement

    Publication
    • M. Piani
    • S. Gharibian
    • G. Adesso
    • J. Calsamigilia
    • P. Horodecki
    • A. Winter

    - PHYSICAL REVIEW LETTERS - Year 2011

    We devise a protocol in which general nonclassical multipartite correlations produce a physically relevant effect, leading to the creation of bipartite entanglement. In particular, we show that the relative entropy of quantumness, which measures all nonclassical correlations among subsystems of a quantum system, is equivalent to and can be operationally interpreted as the minimum distillable entanglement generated between the system...

    Full text to download in external service

  • Key Engineering Materials

    Journals

    ISSN: 1662-9795