Energy flow in the Photosystem I supercomplex: Comparison of approximative theories with DM-HEOM

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Journal Article
Chemical Physics, 2018, 515 pp. 262 - 271
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© 2018 Elsevier B.V. We analyze the exciton dynamics in Photosystem I from Thermosynechococcus elongatus using the distributed memory implementation of the hierarchical equation of motion (DM-HEOM) for the 96 Chlorophylls in the monomeric unit. The exciton-system parameters are taken from a first principles calculation. A comparison of the exact results with Förster rates and Markovian approximations allows one to validate the exciton transfer times within the complex and to identify deviations from approximative theories. We show the optical absorption, linear, and circular dichroism spectra obtained with DM-HEOM and compare them to experimental results.
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