Nonadiabatic features of electron pumping through a quantum dot in the Kondo regime

We investigate the behavior of the dc electronic current J(dc) in an interacting quantum dot driven by two ac local potentials oscillating with a frequency Omega(0) and a phase lag phi. We provide analytical functions to describe the fingerprints of the Coulomb interaction in an experimental J(dc) vs phi characteristic curve. We show that the Kondo resonance, at low temperatures, reduces the frequency range for the linear behavior of J(dc) in Omega(0) to take place and determines the evolution of the dc current as the temperature increases.