Dynamically enhanced unconventional superconducting correlations in a Hubbard ladder

Abstract

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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• Pair correlations in the two-orbital Hubbard ladder: Implications on superconductivity in the bilayer nickelate La${}_3$Ni${}_2$O${}_7$
• Analytical Solution for the Steady States of the Driven Hubbard model
• Floquet-engineered pair and single particle filter in the Fermi Hubbard model
• Floquet-engineered light-cone spreading of correlations in a driven quantum chain
• Momentum resolved Floquet-engineered pair and single particle filter in the Fermi Hubbard model
• Dynamically generated quadrupole polarization using Floquet adiabatic evolution
• Many-body correlations in Floquet steady-states: Frequency-resolved renormalization group of the driven Anderson impurity