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Long-Lived Coherence Originating from Electronic-Vibrational Couplings in Light-Harvesting Complexes
Xian-ting Liang*
Author NameAffiliationE-mail
Xian-ting Liang* Department of Physics and Institute of Optics, Ningbo University, Ningbo 315211, China liangxianting@nbu.edu.cn 
Abstract:
We theoretically investigate the evolutions of two-dimensional, third-order, nonlinear pho-ton echo rephasing spectra with population time by using an exact numerical path integral method. It is shown that for the same system, the coherence time and relaxation time of excitonic states are short, however, if the couplings of electronic and intra-pigment vibra-tional modes are considered, the coherence time and relaxation time of this vibronic states are greatly extended. It means that the couplings between electronic and vibrational modes play important roles in keeping long-lived coherence in light-harvesting complexes. Particularly, by using the method we can fix the transition path of the energy transfer in bio-molecular systems.
Key words:  Light-harvesting complex  Coherence  Exciton model  Vibronic model
FundProject:This work was supported by the Zhejiang Provincial Natural Science Foundation of China (No.LY13A040006), and the K. C. Wong Magna Foundation in Ningbo University
捕光复合物中起源于电子-振动耦合的长时间相干
梁先庭*
摘要:
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DOI:10.1063/1674-0068/30/cjcp1609188
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