Bloch-Redfield equations for modeling light-harvesting complexes

Jeske, J, Ing, D, Plenio, M, Huelga, S and Cole, J 2015, 'Bloch-Redfield equations for modeling light-harvesting complexes', AIP Journal of Chemical Physics, vol. 142, no. 6, 064104, pp. 1-12.


Document type: Journal Article
Collection: Journal Articles

Title Bloch-Redfield equations for modeling light-harvesting complexes
Author(s) Jeske, J
Ing, D
Plenio, M
Huelga, S
Cole, J
Year 2015
Journal name AIP Journal of Chemical Physics
Volume number 142
Issue number 6
Article Number 064104
Start page 1
End page 12
Total pages 12
Publisher American Institute of Physics Publishing
Abstract We challenge the misconception that Bloch-Redfield equations are a less powerful tool than phenomenological Lindblad equations for modeling exciton transport in photosynthetic complexes. This view predominantly originates from an indiscriminate use of the secular approximation. We provide a detailed description of how to model both coherent oscillations and several types of noise, giving explicit examples. All issues with non-positivity are overcome by a consistent straightforward physical noise model. Herein also lies the strength of the Bloch-Redfield approach because it facilitates the analysis of noise-effects by linking them back to physical parameters of the noise environment. This includes temporal and spatial correlations and the strength and type of interaction between the noise and the system of interest. Finally, we analyze a prototypical dimer system as well as a 7-site Fenna-Matthews-Olson complex in regards to spatial correlation length of the noise, noise strength, temperature, and their connection to the transfer time and transfer probability.
Subject Biological Physics
Quantum Physics not elsewhere classified
Quantum Chemistry
Keyword(s) Photosynthesis
light-harvesting complex
Bloch Redfield equations
DOI - identifier 10.1063/1.4907370
Copyright notice © 2015 AIP Publishing LLC
ISSN 0021-9606
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