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arxiv 1902.07947 v1 pith:RLBVGYKY submitted 2019-02-21 cond-mat.supr-con cond-mat.str-el

Dynamically enhanced unconventional superconducting correlations in a Hubbard ladder

classification cond-mat.supr-con cond-mat.str-el
keywords hubbardladdersuperconductingunconventionalcorrelationsenergyenhancedfloquet
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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We propose theoretically how unconventional superconducting pairing in a repulsively interacting Hubbard ladder can be enhanced via the application of a Floquet driving. Initially the Hubbard ladder is prepared in its charge-density-wave dominated ground state. A periodic Floquet drive is applied which modulates oppositely the energy offset of the two chains and effectively reduces the tunneling along the rungs. This modulation of the energy offsets might be caused by the excitation of a suitable phononic mode in solids or a superlattice modulation in cold atomic gases. We use state-of-the-art density matrix renormalization group methods to monitor the resulting real-time dynamics of the system. We find an enormous enhancement of the unconventional superconducting pair correlations by approximately one order of magnitude.

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