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MO: Fachverband Molekülphysik

MO 7: Femtosecond Spectroscopy I: Electronic 2D Spectroscopy (contributed for SYED in MO)

MO 7.2: Vortrag

Montag, 18. März 2013, 16:45–17:00, F 102

The role of non-equilibrium vibrational structures in electronic coherence and recoherence in pigment protein complexes — •Felipe Caycedo-Soler¹, Alex W. Chin^1,2, Javier Prior³, Robert Rosenbach¹, Susana F. Huelga¹, and Martin B. Plenio¹ — ¹Institute of Theoretical Physics, Universität Ulm, Albert-Einstein-Allee 11, 89069 Ulm, Germany — ²Theory of Condensed Matter Group, Cavendish Laboratory, University of Cambridge, J J Thomson Avenue, Cambridge, CB3 0HE, UK — ³Departamento de Física Aplicada, Universidad Politécnica de Cartagena, Cartagena 30202, Spain

Recent observations of oscillations in the non-linear optical response of photosynthetic complexes, have revealed evidence for surprisingly long-lasting electronic coherences which can coexist with energy transport. Here we show that the non-trivial spectral structures of protein fluctuations can generate non-equilibrium processes that lead to the spontaneous creation and sustenance of electronic coherence, even at physiological temperatures. Developing new advanced simulation tools to treat these effects, we provide a firm microscopic basis to successfully reproduce the time-scale for survival of the experimentally observed coherence in the Fenna*Matthews*Olson complex, and illustrate how detailed quantum modelling and simulation can shed further light on a wide range of other non-equilibrium processes which may be important in different photosynthetic systems.