Designing optimum completely positive maps for quantum teleportation

Jaroslav Rehacek, Zdenek Hradil, Jaromir Fiurasek, Caslav Brukner

    Publications: Contribution to journalArticlePeer Reviewed

    Abstract

    We study a general teleportation scheme with an arbitrary state of the pair of particles (2 and 3) shared by Alice and Bob, and arbitrary measurements on the input particle 1 and one of the members (2) of the pair on Alice’s side. We find an efficient iterative algorithm for identifying optimum operations on Bob’s side. In particular, we find that simple unitary transformations on his side are not always optimal even if particles 2 and 3 are perfectly entangled. We describe the most interesting protocols in the language of extremal completely positive maps. © 2001 The American Physical Society.
    Original languageEnglish
    Article number060301(R)
    JournalPhysical Review A
    Volume64
    Issue number6
    DOIs
    Publication statusPublished - 2001

    Austrian Fields of Science 2012

    • 103026 Quantum optics

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