Non-adiabatic Electron Pumping through Interacting Quantum Dots

Details Non-adiabatic Electron Pumping through Interacting Quantum Dots Non-adiabatic Electron Pumping through Interacting Quantum Dots

2011-10-24

arxiv.org/abs/1110.5298v1

Phys. Rev. B 85, 035309 (2012)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

11 pages, 4 figures

Scientific paper

10.1103/PhysRevB.85.035309

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 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.

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