State transfer in highly connected networks and a quantum Babinet principle

D.I. Tsomokos, M.B. Plenio, I. de Vega, S.F. Huelga

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    15 Citations (Scopus)
    46 Downloads (Pure)

    Abstract

    The transfer of a quantum state between distant nodes in two-dimensional networks, is considered. The fidelity of state transfer is calculated as a function of the number of interactions in networks that are described by regular graphs. It is shown that perfect state transfer is achieved in a network of size N, whose structure is that of a N 2 -cross polytope graph, if N is a multiple of 4. The result is reminiscent of the Babinet principle of classical optics. A quantum Babinet principle is derived, which allows for the identification of complementary graphs leading to the same fidelity of state transfer, in analogy with complementary screens providing identical diffraction patterns.
    Original languageEnglish
    JournalPhysical Review A
    Volume78
    Issue number6
    DOIs
    Publication statusPublished - 2008

    Keywords

    • diffraction
    • graph theory
    • quantum optics

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