Quantum teleportation of composite systems via mixed entangled states

Somshubhro Bandyopadhyay, Barry C. Sanders

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    We analyze quantum teleportation for composite systems, specifically for concatenated teleporation (decomposing a large composite state into smaller states of dimension commensurate with the channel) and partial teleportation (teleporting one component of a larger quantum state). We obtain an exact expression for teleportation fidelity that depends solely on the dimension and singlet fraction for the entanglement channel and entanglement (measures by I concurrence) for the state; in fact quantum teleportation for composite systems provides an operational interpretation for I concurrence. In addition we obtain tight bounds on teleportation fidelity and prove that the average fidelity approaches the lower bound of teleportation fidelity in the high-dimension limit.
    Original languageEnglish
    Pages (from-to)032310-1-032310-10
    Number of pages10
    JournalPhysical Review A - Atomic, Molecular, and Optical Physics
    Issue number3
    Publication statusPublished - 2006

    Bibliographical note

    Copyright 2006 by The American Physical Society. Reprinted from Physical review A.


    • teleportation
    • quantum entanglement


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