Volume 11, Issue 3 e1498
Advanced Review

Theoretical study of excitation energy transfer and nonlinear spectroscopy of photosynthetic light-harvesting complexes using the nonperturbative reduced dynamics method

Yaming Yan

Yaming Yan

Beijing National Laboratory for Molecular Sciences, State Key Laboratory for Structural Chemistry of Unstable and Stable Species, Institute of Chemistry, Chinese Academy of Sciences, Beijing, China

University of Chinese Academy of Sciences, Beijing, China

Physical Science Laboratory, Huairou National Comprehensive Science Center, Beijing, China

Contribution: Writing - original draft, Writing - review & editing

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Yanying Liu

Yanying Liu

Beijing National Laboratory for Molecular Sciences, State Key Laboratory for Structural Chemistry of Unstable and Stable Species, Institute of Chemistry, Chinese Academy of Sciences, Beijing, China

University of Chinese Academy of Sciences, Beijing, China

Physical Science Laboratory, Huairou National Comprehensive Science Center, Beijing, China

Contribution: Writing - original draft, Writing - review & editing

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Tao Xing

Tao Xing

Beijing National Laboratory for Molecular Sciences, State Key Laboratory for Structural Chemistry of Unstable and Stable Species, Institute of Chemistry, Chinese Academy of Sciences, Beijing, China

University of Chinese Academy of Sciences, Beijing, China

Physical Science Laboratory, Huairou National Comprehensive Science Center, Beijing, China

Contribution: Writing - original draft, Writing - review & editing

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Qiang Shi

Corresponding Author

Qiang Shi

Beijing National Laboratory for Molecular Sciences, State Key Laboratory for Structural Chemistry of Unstable and Stable Species, Institute of Chemistry, Chinese Academy of Sciences, Beijing, China

University of Chinese Academy of Sciences, Beijing, China

Physical Science Laboratory, Huairou National Comprehensive Science Center, Beijing, China

Correspondence

Qiang Shi, Beijing National Laboratory for Molecular Sciences, State Key Laboratory for Structural Chemistry of Unstable and Stable Species, Institute of Chemistry, Chinese Academy of Sciences, Zhongguancun, Beijing 100190, China.

Email: [email protected]

Contribution: Conceptualization, Supervision, Writing - original draft, Writing - review & editing

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First published: 06 August 2020
Citations: 37

Funding information: Beijing Municipal Science & Technology Commission, Grant/Award Number: Z191100007219009; National Natural Science Foundation of China, Grant/Award Numbers: 21673246, 21933011

Abstract

The highly efficient excitation energy transfer (EET) processes in photosynthetic light-harvesting complexes have attracted much recent research interests. Experimentally, spectroscopic studies have provided important information on the energetics and EET dynamics. Theoretically, due to the large number of degrees of freedom and the complex interaction between the pigments and the protein environment, it is impossible to simulate the whole system quantum mechanically. Effective Hamiltonian models are often used, in which the most important degrees of freedom are treated explicitly and all the other degrees of freedom are treated as a thermal bath. However, even with such simplifications, solving the real-time quantum dynamics could still be a difficult task. A particular challenging case in simulating the EET dynamics and related spectroscopic phenomena lies in the so-called intermediate coupling regime, where the intermolecular electronic couplings and the electronic–vibrational couplings are of similar strength. In this article, we review theoretical studies of linear and nonlinear spectroscopic signals of photosynthetic light-harvesting complexes, using the nonperturbative hierarchical equations of motion (HEOM) approach. Simulations were performed for the EET dynamics, various types of linear spectra, two-dimensional electronic spectra, and pump–probe spectra. Benchmark tests of several approximate methods related to the HEOM approach were also discussed. The results show that the nonperturbative HEOM approach is an effective method in simulating the EET dynamics and spectroscopic signals of photosynthetic light-harvesting complexes. Important insights into EET pathways, quantum effects including quantum delocalization, and quantum coherence in photosynthetic light-harvesting complexes were also obtained through such simulations.

This article is categorized under:

  • Theoretical and Physical Chemistry > Reaction Dynamics and Kinetics
  • Theoretical and Physical Chemistry > Spectroscopy
  • Software > Simulation Methods

Graphical Abstract

The nonperturbative hierarchical equations of motion (HEOM) approach provides an effective method in simulating the excitation energy transfer (EET) dynamics and related spectroscopic phenomena in photosynthetic light-harvesting complexes. Important insights into EET pathways, effects of quantum delocalization, and quantum coherence on the EET dynamics are obtained through such studies.

CONFLICT OF INTEREST

The authors have declared no conflicts of interest for this article.