Globally controlled quantum wires for perfect qubit transport, mirroring, and computing

Joseph Fitzsimons*, Jason Twamley

*Corresponding author for this work

    Research output: Contribution to journalArticlepeer-review

    98 Citations (Scopus)
    8 Downloads (Pure)


    We describe a new design for a q wire with perfect transmission using a uniformly coupled Ising spin chain subject to global pulses. In addition to allowing for the perfect transport of single qubits, the design also yields the perfect "mirroringa" of multiply encoded qubits within the wire. We further utilize this global-pulse generated perfect mirror operation as a "clock cyclea" to perform universal quantum computation on these multiply encoded qubits where the interior of the q wire serves as the quantum memory while the q-wire ends perform one- and two-qubit gates.

    Original languageEnglish
    Article number090502
    Pages (from-to)1-4
    Number of pages4
    JournalPhysical Review Letters
    Issue number9
    Publication statusPublished - 2006

    Bibliographical note

    Fitzsimons, Joseph and Twamley, Jason, Physical review letters, Vol. 97, Article No. 090502, 2006. "Copyright 2006 by the American Physical Society."


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