CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES |
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Energy transfer between two aggregates in light-harvesting complexes |
Wang Xiao-Lian (汪小莲), Li Hong-Rong (李宏荣), Zhang Pei (张沛), Li Fu-Li (李福利) |
Department of Applied Physics, Xian Jiaotong University, Xian 710049, China |
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Abstract Energy transfer processes between two aggregates in a coupled chromophoric-pigment (protein) system are studied via the standard master equation approach. Each pigment of the two aggregates is modeled as a two-level system. The excitation energy is assumed to be transferred from the donor aggregate to the acceptor aggregate. The model can be used to theoretically simulate many aspects of light-harvesting complexes (LHCs). By applying the real bio-parameters of photosynthesis, we numerically investigate the efficiency of energy transfer (EET) between the two aggregates in terms of some factors, e.g., the initial coherence of the donor aggregate, the coupling strengthes between the two aggregates and between different pigments, and the effects of noise from the environment. Our results provide evidence for that the actual numbers of pigments in the chromophoric rings of LHCs should be the optimum parameters for a high EET. We also give a detailed analysis of the effects of noise on the EET.
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Received: 27 April 2013
Revised: 27 May 2013
Accepted manuscript online:
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PACS:
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71.35.-y
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(Excitons and related phenomena)
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71.23.An
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(Theories and models; localized states)
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Fund: Project supported by the National Natural Science Foundation of China (Grant No. 11174233) and the National Basic Research Program of China (Grant No. 2011CB311807). |
Corresponding Authors:
Li Hong-Rong
E-mail: hrli@mail.xjtu.edu.cn
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Cite this article:
Wang Xiao-Lian (汪小莲), Li Hong-Rong (李宏荣), Zhang Pei (张沛), Li Fu-Li (李福利) Energy transfer between two aggregates in light-harvesting complexes 2013 Chin. Phys. B 22 117102
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