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Title: Coherent or hopping like energy transfer in the chlorosome ?

Abstract

Chlorosomes, as part of the light-harvesting system of green bacteria, are the largest and most efficient antennae systems in nature. We have studied energy transfer dynamics in the chlorosome in a simplified toy model employing a master equation. Dephasing and relaxation due to environmental fluctuations are included by Lindblad dephasing and Redfield thermalization rates. We find at room temperature three separate time scales, i.e. 25 fs, 250 fs and 2.5 ps and determine the according energy pathways through the hierarchical structure in the chlorosome. Quantum coherence lives up to 150 fs at which time the energy is spread over roughly 12 pigments in our model.

Authors:
 [1]
  1. I. Institut für Theoretische Physik, Universität Hamburg, Jungiusstraße 9, 20355 Hamburg, Germany and The Hamburg Centre for Ultrafast Imaging, Luruper Chaussee 149, 22761 Hamburg (Germany)
Publication Date:
OSTI Identifier:
22308257
Resource Type:
Journal Article
Journal Name:
AIP Conference Proceedings
Additional Journal Information:
Journal Volume: 1610; Journal Issue: 1; Conference: TIDS15: 15. international conference on transport in interacting disordered systems, Sant Feliu de Guixols (Spain), 1-5 Sep 2013; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0094-243X
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; ANTENNAS; BACTERIA; ENERGY TRANSFER; EQUATIONS; FLUCTUATIONS; PIGMENTS; RELAXATION; TEMPERATURE RANGE 0273-0400 K; THERMALIZATION

Citation Formats

Nalbach, Peter. Coherent or hopping like energy transfer in the chlorosome ?. United States: N. p., 2014. Web. doi:10.1063/1.4893524.
Nalbach, Peter. Coherent or hopping like energy transfer in the chlorosome ?. United States. https://doi.org/10.1063/1.4893524
Nalbach, Peter. 2014. "Coherent or hopping like energy transfer in the chlorosome ?". United States. https://doi.org/10.1063/1.4893524.
@article{osti_22308257,
title = {Coherent or hopping like energy transfer in the chlorosome ?},
author = {Nalbach, Peter},
abstractNote = {Chlorosomes, as part of the light-harvesting system of green bacteria, are the largest and most efficient antennae systems in nature. We have studied energy transfer dynamics in the chlorosome in a simplified toy model employing a master equation. Dephasing and relaxation due to environmental fluctuations are included by Lindblad dephasing and Redfield thermalization rates. We find at room temperature three separate time scales, i.e. 25 fs, 250 fs and 2.5 ps and determine the according energy pathways through the hierarchical structure in the chlorosome. Quantum coherence lives up to 150 fs at which time the energy is spread over roughly 12 pigments in our model.},
doi = {10.1063/1.4893524},
url = {https://www.osti.gov/biblio/22308257}, journal = {AIP Conference Proceedings},
issn = {0094-243X},
number = 1,
volume = 1610,
place = {United States},
year = {Wed Aug 20 00:00:00 EDT 2014},
month = {Wed Aug 20 00:00:00 EDT 2014}
}