Regensburg 2016 – wissenschaftliches Programm
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BP: Fachverband Biologische Physik
BP 48: Posters - Bioimaging and Spectroscopy
BP 48.19: Poster
Mittwoch, 9. März 2016, 17:00–19:00, Poster C
Signatures of correlated noise and disorder in 2D electronic spectroscopy — •David J. Ing1, 2, James Lim2, Jan Jeske1, Jared H. Cole1, Susana F. Huelga2, and Martin B. Plenio2 — 1Chemical and Quantum Physics, School of Applied Sciences, RMIT University, Melbourne, Victoria 3001, Australia — 2Institut für Theoretische Physik, Albert-Einstein-Allee 11, Universität Ulm, D-89069 Ulm, Germany
Two-dimensional electronic spectroscopy has revealed the presence of long-lived quantum coherences in photosynthetic systems. To explain the microscopic origin of the long-lived coherences in these biological systems, several hypotheses have been formulated theoretically, including correlated noise and vibronic coupling. However the complexity of photosynthetic systems and their 2D spectra make the identification of the microscopic origin a challenging task. Here, we investigate a correlated noise model to study how the correlations in noise and disorder affect the features in 2D spectra. By employing the Bloch-Redfield equation, where the degree of spatial correlation can be quantified continuously, we show that the amount of correlation affects both the lineshapes and lifetimes of oscillatory 2D signals. We also show how non-secular effects in the noise, that yield to coupling between populations and coherences, influence the 2D signals.