Regensburg 2013 – wissenschaftliches Programm
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DY: Fachverband Dynamik und Statistische Physik
DY 1: Quantum Dynamics, Decoherence and Quantum Information I
DY 1.9: Vortrag
Montag, 11. März 2013, 11:45–12:00, H39
Influence of Vibrations on Energy Transfer and Optical Properties of Light-Harvesting Systems — •Gerhard Ritschel1, Jan Roden1,3, Walter T. Strunz2, and Alexander Eisfeld1,4 — 1Max-Planck-Institut für Physik komplexer Systeme, Dresden, Germany — 2Technische Universität Dresden, Germany — 3University of California, Berkeley, USA — 4Harvard University, Cambridge, USA
The transfer of electronic excitation energy as well as optical properties of complexes of interacting chromophores, e.g. the FMO complex or the LH2 antennae in biological photosynthetic systems, are strongly influenced by an environment. For a proper theoretical description it is essential to include non-Markovian effects resulting from an electron-environment coupling that is a rather structured function of energy leading to a complicated retroaction on the excitation dynamics. Based on the non-Markovian quantum state diffusion an approximate non-perturbative master equation can be derived that captures the whole range from coherent dynamics to incoherent diffusion. Especially situations where environment-assisted transfer occurs can be investigated. Using that approach we calculated energy transfer in one FMO subunit as well as in the full FMO trimer and calculated linear spectra at various temperatures employing the thermofield description.