Regensburg 2007 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 5: Correlated Electrons - (General) Theory
TT 5.7: Hauptvortrag
Montag, 26. März 2007, 16:00–16:30, H18
Electronic Correlations in Electron-Transfer Systems — •Ralf Bulla1, Sabine Tornow1, and Frithjof Anders2 — 1Theoretische Physik III, Elektronische Korrelationen und Magnetismus, Institut für Physik, Universität Augsburg — 2Fachbereich 1, Universität Bremen
Electron transfer processes play an important role in a variety of physical, chemical, and biological systems. Already the transfer of a single electron from the donor to the acceptor can be viewed as a complicated many-body problem, due to the coupling of the electron to the infinitely many environmental degrees of freedom, usually described as a bosonic bath. Here we focus on the quantum mechanical modelling of two-electron transfer processes and the influence of the Coulomb interaction between the electrons. It turns out that electronic correlations significantly influence the dynamics of the electron transfer process. We identify situations under which concerted transfer of the two electrons occurs, in contrast to a stepwise single-electron transfer. Calculations are performed using the non-perturbative numerical renormalization group approach for both equilibrium and non-equilibrium properties.