Electron-light interaction in nonequilibrium: exact diagonalization for time-dependent Hubbard HamiltoniansMichael Innerberger, Paul Worm, Paul Prauhart and Anna KauchEur. Phys. J. Plus, 135 11 (2020) 922DOI: https://doi.org/10.1140/epjp/s13360-020-00919-2