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TT: Tiefe Temperaturen

TT 26: Transport - Poster Session

TT 26.12: Poster

Mittwoch, 29. März 2006, 14:30–18:30, P1

A diagrammatic approach to adiabatic pumping — •Janine Splettstoesser^1,2, Michele Governale^1,2, Jürgen König², and Rosario Fazio¹ — ¹Scuola Normale Superiore, Piazza dei Cavalieri, I-56126 Pisa — ²Institut für Theoretische Physik, Ruhr-Universität Bochum, D-44780 Bochum

We consider adiabatic charge pumping through an interacting single-level quantum dot. We present a general perturbation theory approach for the adiabatic expansion using a diagrammatic technique [1,2] and apply it to the pumped current up to second order Γ contributions in the self energy. It turns out that second leading order contributions of the perturbation expansion of the adiabatically pumped charge are exclusively due to level renormalization effects.

[1] J. König, H. Schoeller, and G. Schön, Phys. Rev. Lett.76, 1715 (1996).

[2] J. König, J. Schmid, H. Schoeller, and G. Schön, Phys. Rev. B 54, 16820 (1996)