Multipartite continuous-variable solution for the Byzantine agreement problem

Rodion Neigovzen, Carles Rodó, Gerardo Adesso, Anna Sanpera

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6 Citations (Scopus)

Abstract

We demonstrate that the Byzantine agreement (detectable broadcast) is also solvable in the continuous-variable scenario with multipartite entangled Gaussian states and Gaussian operations (homodyne detection). Within this scheme we find that Byzantine agreement requires a minimum amount of entanglement in the multipartite states used in order to achieve a solution. We discuss realistic implementations of the protocol, which consider the possibility of having inefficient homodyne detectors, not perfectly correlated outcomes, and noise in the preparation of the resource states. The proposed protocol is proven to be robust and efficiently applicable under such nonideal conditions. © 2008 The American Physical Society.
Original languageEnglish
Article number062307
JournalPhysical Review A - Atomic, Molecular, and Optical Physics
Volume77
Issue number6
DOIs
Publication statusPublished - 4 Jun 2008

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    Neigovzen, R., Rodó, C., Adesso, G., & Sanpera, A. (2008). Multipartite continuous-variable solution for the Byzantine agreement problem. Physical Review A - Atomic, Molecular, and Optical Physics, 77(6), [062307]. https://doi.org/10.1103/PhysRevA.77.062307