Berlin 2008 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 22: Transport: Poster Session
TT 22.7: Poster
Mittwoch, 27. Februar 2008, 14:00–18:00, Poster B
Signatures of Aharonov-Bohm effect in the charge transfer statistics of the interacting quantum dot — •Stefan Maier1 and Andrei Komnik1,2 — 1Physikalisches Institut, Albert-Ludwigs-Universität Freiburg, Hermann-Herder-Str. 3, 79104 Freiburg, Germany — 2Institut für Theoretische Physik, Universität Heidelberg, Philosophenweg 19, 69120 Heidelberg, Germany
We study the electron transport statistics of an Aharonov-Bohm interferometer with an embedded single level quantum dot under non-equilibrium conditions. Special emphasis is placed on the interplay of Aharonov-Bohm interferences and Coulomb on-site interaction. To this end we model the system by an Anderson impurity coupled to two metallic electrodes, between which a direct tunnelling is possible. By means of perturbative expansion in interaction amplitude we are able to identify the relevant effects in the generating function of the charge transfer statistics. We see a pronounced magnetic field dependence of the latter and investigate the evolution of the emerging Fano resonances as the electrode-dot as well as electrode-electrode couplings are changed.