Role of Quantum Coherence and Environmental Fluctuations in Chromophoric Energy Transport
Role of Quantum Coherence and Environmental Fluctuations in Chromophoric Energy Transport
复制标题
DOI：
10.1021/jp901724d
复制
发表时间：
2009-07-23
影响因子：
3.3
通讯作者：
Aspuru-Guzik, Alan
中科院分区：
文献类型：
--
作者：
Rebentrost, Patrick;Mohseni, Masoud;Aspuru-Guzik, Alan
量子相干性在发色复合物中光合能量转移动力学中的作用还没有完全理解。在这项工作中，我们量化的基本物理过程的生物重要性，如激子哈密顿演化和声子诱导的退相干，通过它们的贡献的效率的主要光合事件。我们研究了声子浴中的空间相关性和缓慢的蛋白质支架运动对效率和贡献过程的影响。为此，我们发展了基于绿色函数法和能量传递磁化率的两种理论方法。我们调查的费马-马修斯-奥尔森蛋白质复合物，在其中，我们发现相干动力学的贡献约10%的存在下，不相关的声子和约30%的存在下，现实相关的。
The role of quantum coherence in the dynamics of photosynthetic energy transfer in chromophoric complexes is not fully understood. In this work, we quantify the biological importance of fundamental physical processes, such its the excitonic Hamiltonian evolution and phonon-induced decoherence, by their contribution to the efficiency of the primary photosynthetic event. We study the effect of spatial correlations in the phonon bath and slow protein scaffold movements on the efficiency and the contributing processes. To this end, we develop two theoretical approaches based oil a Green's function method and energy transfer Susceptibilities. We investigate the Ferma-Matthews-Olson protein complex, in which we find a contribution of coherent dynamics of about 10% in the presence of uncorrelated phonons and about 30% in the presence of realistically correlated ones.