Berlin 2012 – wissenschaftliches Programm
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DY: Fachverband Dynamik und Statistische Physik
DY 4: Quantum Dynamics, Decoherence, and Quantum Information
DY 4.9: Vortrag
Montag, 26. März 2012, 17:15–17:30, MA 001
Exciton transfer dynamics and quantumness of energy transfer in the Fenna-Matthews-Olson complex — •Peter Nalbach1, Daniel Braun2, and Michael Thorwart1 — 1I. Institut für Theoretische Physik, Universität Hamburg, Jungiusstraße 9, 20355 Hamburg, Germany — 2Laboratoire de Physique Théorique, Université Paul Sabatier, 118, route de Narbonne, 31062 Toulouse, France
We present numerically exact results for the quantum coherent energy transfer in the Fenna-Matthews-Olson molecular aggregate under realistic physiological conditions, including vibrational fluctuations of the protein and the pigments for an experimentally determined fluctuation spectrum. We find coherence times shorter than observed experimentally. Furthermore we determine the energy transfer current and quantify its “quantumness” as the distance of the density matrix to the classical pointer states for the energy current operator. Most importantly, we find that the energy transfer happens through a “Schrödinger-cat” like superposition of energy current pointer states.