The effect of correlated bath fluctuations on exciton transfer.
The effect of correlated bath fluctuations on exciton transfer.
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DOI：
10.1063/1.3557042
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发表时间：
2011-03
期刊：
影响因子：
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通讯作者：
J. Strümpfer;K. Schulten
中科院分区：
文献类型：
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作者：
J. Strümpfer;K. Schulten
各种光捕获系统的激发动力学已经用许多理论方法研究，包括耗散量子动力学的各种非马尔可夫描述。通常假设每个激发态耦合到独立的热环境，即，不同环境下的波动是不相关的。这里放弃了这一假设，并研究了相关浴波动对激发转移的影响。使用耗散量子动力学的运动方程的层次，它是显示的模型的B850细菌叶绿素的LH2，相关浴波动有显着的影响LH2→LH2激发转移速率。它也表明，列入静态无序是至关重要的转移动力学的准确描述。
Excitation dynamics of various light harvesting systems have been investigated with many theoretical methods including various non-Markovian descriptions of dissipative quantum dynamics. It is typically assumed that each excited state is coupled to an independent thermal environment, i.e., that fluctuations in different environments are uncorrelated. Here the assumption is dropped and the effect of correlated bath fluctuations on excitation transfer is investigated. Using the hierarchy equations of motion for dissipative quantum dynamics it is shown for models of the B850 bacteriochlorophylls of LH2 that correlated bath fluctuations have a significant effect on the LH2→LH2 excitation transfer rate. It is also demonstrated that inclusion of static disorder is crucial for an accurate description of transfer dynamics.