Photoinduced Enhancement of Superconductivity in the Plaquette Hubbard Model

Real-time dynamics techniques have been proven useful in understanding strongly correlated systems both theoretically and experimentally. By employing unbiased time-resolved exact diagonalization, we performed numerical simulations to study pump dynamics in the two-dimensional plaquette Hubbard model, where t and t' are used to represent hopping integrals within and between plaquettes. In the intermediate coupling regime, an enhancement of d-wave superconductivity is observed and examined via comparison with eigenstates of the Hamiltonian. Our work provides further understanding of superconductivity in the Hubbard model and offers an promising approach for experimentally engineering emergent states out of equilibrium.