Routing quantum information in spin chains

Simone Paganelli, Salvatore Lorenzo, Tony J.G. Apollaro, Francesco Plastina, Gian Luca Giorgi

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    Abstract

    Two different models are presented that allow for efficiently performing routing of a quantum state. Both cases involve an XX spin chain working as a data bus and additional spins that play the role of sender and receivers, one of which is selected to be the target of the quantum state transmission protocol via a coherent quantum coupling mechanism making use of local and/or global magnetic fields. Quantum routing is achieved in the first of the models considered by weakly coupling the sender and the receiver to the data bus. On the other hand, in the second model, local magnetic fields acting on additional spins located between the sender and receiver and the data bus allow us to perform high-fidelity routing. © 2013 American Physical Society.
    Original languageEnglish
    Article number062309
    JournalPhysical Review A - Atomic, Molecular, and Optical Physics
    Volume87
    Issue number6
    DOIs
    Publication statusPublished - 10 Jun 2013

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    Paganelli, S., Lorenzo, S., Apollaro, T. J. G., Plastina, F., & Giorgi, G. L. (2013). Routing quantum information in spin chains. Physical Review A - Atomic, Molecular, and Optical Physics, 87(6), [062309]. https://doi.org/10.1103/PhysRevA.87.062309