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Transport enhancement from incoherent coupling between one-dimensional quantum conductors


Reference:

Mendoza-Arenas, J. J., Mitchison, M. T., Clark, S. R., Prior, J., Jaksch, D. and Plenio, M. B., 2014. Transport enhancement from incoherent coupling between one-dimensional quantum conductors. New Journal of Physics, 16, 053016.

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    Official URL:

    http://dx.doi.org/10.1088/1367-2630/16/5/053016

    Abstract

    We study the non-equilibrium transport properties of a highly anisotropic two-dimensional lattice of spin-1/2 particles governed by a Heisenberg XXZ Hamiltonian. The anisotropy of the lattice allows us to approximate the system at finite temperature as an array of incoherently coupled one-dimensional chains. We show that in the regime of strong intrachain interactions, the weak interchain coupling considerably boosts spin transport in the driven system. Interestingly, we show that this enhancement increases with the length of the chains, which is related to superdiffusive spin transport. We describe the mechanism behind this effect, compare it to a similar phenomenon in single chains induced by dephasing, and explain why the former is much stronger.

    Details

    Item Type Articles
    CreatorsMendoza-Arenas, J. J., Mitchison, M. T., Clark, S. R., Prior, J., Jaksch, D. and Plenio, M. B.
    DOI10.1088/1367-2630/16/5/053016
    Uncontrolled Keywordscond-mat.str-el,cond-mat.stat-mech
    DepartmentsFaculty of Science > Physics
    RefereedYes
    StatusPublished
    ID Code47329

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