Optimal thermal bath for robust excitation energy transfer in disordered light-harvesting complex 2 of purple bacteria
Optimal thermal bath for robust excitation energy transfer in disordered light-harvesting complex 2 of purple bacteria
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DOI：
10.1088/1367-2630/15/12/125030
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发表时间：
2013-12-23
影响因子：
3.3
通讯作者：
Cao, Jianshu
中科院分区：
文献类型：
--
作者：
Cleary, Liam;Cao, Jianshu
利用多发色Forster理论研究了紫色细菌捕光复合体2(LH2)中B800环和B850环之间能量转移的最佳热浴条件。由于两个环之间固有的能量偏置，从B800到B850的能量传递率作为熔池耦合强度的函数被最大化，从而建立了优化准则。关键的是，一旦包含能量无序，这个最大值就被平均出来。然而，注意到转移速率的分布，我们发现浴场耦合强度可以产生最小的速率分布色散，即平均值与标准差的最大比率，从而实现对静态无序的最大能量转移。
The existence of an optimal thermal bath to facilitate robust energy transfer between the spectrally separated B800 and B850 rings in light-harvesting complex 2 (LH2) of purple bacteria is investigated via the multichromophoric Forster theory. Due to the inherent energy bias between the two rings, the energy transfer rate from B800 to B850 is maximized as a function of the bath coupling strength, establishing an optimization criterion. Critically, upon inclusion of energetic disorder, this maximum is averaged out. However, noting the distribution of transfer rates, we find that the bath coupling strength can yield a minimal dispersion for the rate distribution, i.e. a maximum ratio of mean to standard deviation, thus achieving maximum energy transfer robust to the effects of static disorder.