Nonadiabatic electron pumping through interacting quantum dots

Alexander Croy, Ulf Saalmann, Alexis R. Hernández, Caio H. Lewenkopf
2012 Physical Review B  
We study non-adiabatic charge pumping through single-level quantum dots taking into account Coulomb interactions. We show how a truncated set of equations of motion can be propagated in time by means of an auxiliary-mode expansion. This formalism is capable of treating the time-dependent electronic transport for arbitrary driving parameters. We verify that the proposed method describes very precisely the well-known limit of adiabatic pumping through quantum dots without Coulomb interactions. As
more » ... an example we discuss pumping driven by short voltage pulses for various interaction strengths. Such finite pulses are particular suited to investigate transient non-adiabatic effects, which may be also important for periodic drivings, where they are much more difficult to reveal.
doi:10.1103/physrevb.85.035309 fatcat:lh7srjzoqjfbjpcebgxnp6mvxm