The hierarchical equations of motion (HEOM) method was applied to calculate the emission spectra of molecular aggregates using the Frenkel exciton model. HEOM equations for the one-exciton excited state were first propagated until equilibration. The reduced density operator and auxiliary density operators (ADOs) were used to characterize the coupled system-bath equilibrium. The dipole-dipole correlation functions were then calculated to obtain the emission spectra of model dimers, and the B850 band of light-harvesting complex II (LH2) in purple bacteria. The effect of static disorder on equilibrium excited state and the emission spectra of LH2 was also explicitly considered. Several approximation schemes, including the high temperature approximation (HTA) of the HEOM, a modified version of the HTA, the stochastic Liouville equation approach, the perturbative time-local and time-nonlocal generalized quantum master equations, were assessed in the calculation of the equilibrium excited state and emission spectra.
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28 January 2013
Research Article|
January 24 2013
Equilibrium excited state and emission spectra of molecular aggregates from the hierarchical equations of motion approach
Yuanyuan Jing;
Yuanyuan Jing
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
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Liping Chen;
Liping Chen
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
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Shuming Bai;
Shuming Bai
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
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J. Chem. Phys. 138, 045101 (2013)
Article history
Received:
October 19 2012
Accepted:
January 01 2013
Citation
Yuanyuan Jing, Liping Chen, Shuming Bai, Qiang Shi; Equilibrium excited state and emission spectra of molecular aggregates from the hierarchical equations of motion approach. J. Chem. Phys. 28 January 2013; 138 (4): 045101. https://doi.org/10.1063/1.4775843
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