Abstract

We investigate the dynamics of a phonon-mediated superconductor driven out of equilibrium. A decrease of the electronic hopping amplitude with time is applied, which mimics the effect of a resonant THz light pulse transiently modifying the lattice through nonlinear phonon coupling. The induced increase of the density of states near the Fermi-level leads to an enhancement of superconductivity. We provide a time- and momentum-resolved view on the interplay of slow order parameter dynamics and fast single-particle scattering. The importance of electron-phonon coupling for the rapid enhancement and the efficient thermalization of superconductivity is demonstrated.