Dresden 2006 – wissenschaftliches Programm
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TT: Tiefe Temperaturen
TT 5: Transport: Nanoelectronics I - Quantum Dots, Wires, Point Contacts - Part 1
TT 5.4: Vortrag
Montag, 27. März 2006, 10:30–10:45, HSZ 304
Aharonov-Bohm Interferometry with Quantum Dots — •Stefan Legel1, Jürgen König2, and Gerd Schön1,3 — 1Universität Karlsruhe — 2Ruhr-Universität Bochum — 3Forschungszentrum Karlsruhe, Institut für Nanotechnologie
We study electron transport through a closed Aharonov-Bohm interferometer containing two single-level quantum dots. We address the question how Coulomb interaction on the dots affects the coherence of the transport. The method of real-time transport theory enables us to treat these systems both in equilibrium as well as in non-equilibrium. A perturbation expansion in the coupling strength of the quantum dots to the leads allows us to make predictions for the signatures of quantum interference in the conductance of the considered systems in first and second order (so-called cotunneling) in the coupling strength.