dorsal/arxiv
View SchemaInfluence of Static and Dynamic Disorder on the Anisotropy of Emission in the Ring Antenna Subunits of Purple Bacteria Photosynthetic Systems
| Authors | Pavel Herman, Ulrich Kleinekathoefer, Ivan Barvik, Michael Schreiber |
|---|---|
| Categories | |
| ArXiv ID | physics/0106043 |
| URL | https://arxiv.org/abs/physics/0106043 |
| DOI | 10.1016/S0301-0104(01)00520-1 |
Abstract
Using the reduced density matrix formalism the time dependence of the exciton scattering in light-harvesting ring systems 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 Redfield theory in exciton eigenstates without secular approximation. This is shown to be equivalent to the Markovian limit of Capek's theory in local states. Circular aggregates with 18 pigments are studied to model the B850 ring of bacteriochlorophyls within LH2 complexes. 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.
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"abstract": "Using the reduced density matrix formalism the time dependence of the exciton\nscattering in light-harvesting ring systems of purple bacteria is calculated.\nIn contrast to the work of Kumble and Hochstrasser (J. Chem. Phys. 109 (1998)\n855) static disorder (fluctuations of the site energies) as well as dynamic\ndisorder (dissipation) is taken into account. For the description of\ndissipation we use Redfield theory in exciton eigenstates without secular\napproximation. This is shown to be equivalent to the Markovian limit of Capek\u0027s\ntheory in local states. Circular aggregates with 18 pigments are studied to\nmodel the B850 ring of bacteriochlorophyls within LH2 complexes. It can be\ndemonstrated that the dissipation is important for the time-dependent\nanisotropy of the fluorescence. Smaller values of static disorder are\nsufficient to produce the same decay rates in the anisotropy in comparison with\nthe results by Kumble and Hochstrasser.",
"arxiv_id": "physics/0106043",
"authors": [
"Pavel Herman",
"Ulrich Kleinekathoefer",
"Ivan Barvik",
"Michael Schreiber"
],
"categories": [
"physics.chem-ph",
"physics.bio-ph"
],
"doi": "10.1016/S0301-0104(01)00520-1",
"title": "Influence of Static and Dynamic Disorder on the Anisotropy of Emission in the Ring Antenna Subunits of Purple Bacteria Photosynthetic Systems",
"url": "https://arxiv.org/abs/physics/0106043"
},
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