Transient dynamics and steady state behavior of the Anderson–Holstein model with a superconducting lead

We analyze the nonequilibrium dynamics and steady-state behavior of the two-terminal Anderson–Holstein model with a superconducting and a normal conducting lead. In the deep Kondo limit we develop an analytical description if no phonons are included and a rate equation approach when phonons are present. Both cases are compared with the numerically exact diagrammatic Monte Carlo method obtaining a good agreement. For small voltages we find a pronounced enhancement of phonon sidebands due to the SC DOS.