Distribution of entanglement in light-harvesting complexes and their quantum efficiency
Distribution of entanglement in light-harvesting complexes and their quantum efficiency
复制标题
DOI：
10.1088/1367-2630/12/8/085006
复制
发表时间：
2010-08-11
影响因子：
3.3
通讯作者：
Olaya-Castro, Alexandra
中科院分区：
文献类型：
--
作者：
Fassioli, Francesca;Olaya-Castro, Alexandra
最近的证据表明，在光合天线复合物的能量转移过程中的电子相干性重新活跃的讨论相干性和/或纠缠是否有任何实际的功能，这些分子系统。在这里，我们调查的量子产率的捕光复合物和其组件之间的纠缠分布之间的定量关系。我们的研究集中在纠缠产率或平均纠缠生存的时间尺度可比的平均激发捕获时间。我们以绿色硫细菌的Fenna-Matthews-Olson（FMO）蛋白为原型系统，发现量子效率与远距离供体位点之间的平均纠缠度成反比关系.我们的研究结果表明，远程捐助者之间的持久的电子相干性可能有助于光捕获功能的调制。
Recent evidence of electronic coherence during energy transfer in photosynthetic antenna complexes has reinvigorated the discussion about whether coherence and/or entanglement have any practical functionality for these molecular systems. Here we investigate quantitative relationships between the quantum yield of a light-harvesting complex and the distribution of entanglement among its components. Our study focuses on the entanglement yield or average entanglement surviving a time scale comparable to the average excitation trapping time. We consider the Fenna-Matthews-Olson (FMO) protein of green sulfur bacteria as a prototype system and show that there is an inverse relationship between the quantum efficiency and the average entanglement between distant donor sites. Our results suggest that long-lasting electronic coherence among distant donors might help in the modulation of the light-harvesting function.