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Enhancement of super-exchange pairing in the periodically-driven Hubbard model


Reference:

Coulthard, J., Clark, S. R., Al-Assam, S., Cavalleri, A. and Jaksch, D., 2017. Enhancement of super-exchange pairing in the periodically-driven Hubbard model. Physical Review X, 96, 085104.

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    Official URL:

    http://dx.doi.org/10.1103/PhysRevB.96.085104

    Abstract

    We show that periodic driving can enhance electron pairing in strongly-correlated systems. Focusing on the strong-coupling limit of the doped Hubbard model we investigate in-gap, spatially inhomogeneous, on-site modulations and demonstrate that they substantially reduce electronic hopping without suppressing super-exchange interactions and pair hopping. We calculate real-time dynamics for the one-dimensional case, starting from zero and finite temperature initial states, and show that enhanced singlet-pair correlations emerge quickly and robustly in the out-of-equilibrium many-body state. Our results reveal a fundamental pairing mechanism that might underpin optically induced superconductivity in some strongly correlated quantum materials.

    Details

    Item Type Articles
    CreatorsCoulthard, J., Clark, S. R., Al-Assam, S., Cavalleri, A. and Jaksch, D.
    DOI10.1103/PhysRevB.96.085104
    Uncontrolled Keywordscond-mat.quant-gas
    DepartmentsFaculty of Science > Physics
    Research CentresCondensed Matter Physics CDT
    RefereedYes
    StatusPublished
    ID Code57733
    Additional Information12 pages, 9 figures

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