Energy transfer and relaxation dynamics in light-harvesting antenna complexes of photosynthetic bacteria
Energy transfer and relaxation dynamics in light-harvesting antenna complexes of photosynthetic bacteria
复制标题
光合细菌光捕获天线复合体的能量转移和弛豫动力学
DOI：
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发表时间：
1997
期刊：
影响因子：
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通讯作者：
V. Sundström
中科院分区：
文献类型：
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作者：
O. K. and;V. Sundström
利用运动方程方法研究了光合细菌外触角系统中激子的耗散动力学。采用Redfield松弛理论处理与环境自由度的耦合。结果表明，在长期近似的基本激子态的概念提供了一个方便的手段，减少耦合微分方程的数量来解决。此外，我们推导出适当的猝灭矩阵，占弱相互作用的色素池之间的激发能流。数值模拟强调各种弛豫和退相机制以及激子能带结构对能量转移的影响。
The dissipative dynamics of excitons in the outer antenna system of photosynthetic bacteria is investigated using an equation of motion approach. The coupling to environmental degrees of freedom is treated employing Redfield relaxation theory. It is shown that within the secular approximation the concept of essential excitonic states provides a convenient means for reducing the number of coupled differential equations to be solved. Further we derive the appropriate quenching matrix that accounts for the flow of excitation energy between weakly interacting pigment pools. Numerical simulations are presented to emphasize the influence of the various relaxation and dephasing mechanisms as well as the excitonic band structure on the energy transfer.