Berlin 2005 – wissenschaftliches Programm

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AKB: Biologische Physik

AKB 200: Poster Session II

AKB 200.31: Poster

Dienstag, 8. März 2005, 17:00–19:00, Poster TU C

Electron Transfer Rates at Low Temperatures Using Wilsons Renormalization Group — •Sabine Tornow, Ning-Hua Tong, and Ralf Bulla — Theoretische Physik III, Institut für Physik, Universität Augsburg, 86135 Augsburg, Germany

Electron transfer in biomolecules is the key process in photosynthesis, oxidative phosphorilation or DNA damage repair. In the biomolecule complexes electrons are tunneling between donor and acceptor sites which leads to their particular function. The latter is affected by the structure of the protein through the coupling between protein motion and electron transfer. To calculate the transfer rate taking into account this coupling the spin boson model provides a well established description. While limiting cases are well understood in certain parameter regimes non-perturbative methods are needed, e.g., in the crossover from the nonadiabatic to the adiabatic regime. We present a theoretical non-perturbative study of the electron transfer using Wilsons Numerical Renormalization Group method and calculate the thermal rate constant at low temperatures.