Abstract
Using the reduced density matrix formalism the time dependence of the anisotropy of the fluorescence in light-harvesting ring systems LH2 of purple bacteria is calculated. In contrast to the work of Kumble and Hochstrasser [J. Chem. Phys. 109 (1998) 855] static disorder (fluctuations of the site energies) as well as dynamic disorder (dissipation) is taken into account. For the description of dissipation we use the Non-Markovian version of Čápek's theory in local states. It can be demonstrated that the dissipation is important for the time-dependent anisotropy of the fluorescence. Smaller values of static disorder are sufficient to produce the same decay rates in the anisotropy in comparison with the results by Kumble and Hochstrasser. The influence of the non-Markovian terms is thoroughly discussed.
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Heřman, P., Barvík, I. Non-Markovian Effects in the Anisotropy of Emission in the Ring Antenna Subunits of Purple Bacteria Photosynthetic Systems. Czechoslovak Journal of Physics 53, 579–605 (2003). https://doi.org/10.1023/A:1024818417886
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DOI: https://doi.org/10.1023/A:1024818417886