1 research outputs found
Long transient dynamics in the Anderson-Holstein model out of equilibrium
We calculate the time dependent nonequilibrium current through a single level
quantum dot strongly coupled to a vibrational mode. The nonequilibrium real
time dynamics caused by an instantaneous coupling of the leads to the quantum
dot is discussed using an approximate method. The approach, which is specially
designed for the strong polaronic regime, is based on the so-called polaron
tunneling approximation. Considering different initial dot occupations, we show
that a common steady state is reached after times much larger than the typical
electron tunneling times due to a polaron blocking effect in the dot charge. A
direct comparison is made with numerically exact data, showing good agreement
for the time scales accessible by the diagrammatic Monte Carlo simulation
method