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首页> 外文期刊>The journal of physical chemistry, A. Molecules, spectroscopy, kinetics, environment, & general theory >Optimization of Exciton Trapping in Energy Transfer Processes
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Optimization of Exciton Trapping in Energy Transfer Processes

机译：能量转移过程中激子俘获的优化

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摘要

In this paper, we establish optimal conditions for maximal energy transfer efficiency using solutions for multilevel systems and interpret these analytical solutions with more intuitive kinetic networks resulting from a systematic mapping procedure. The mapping procedure defines an effective hopping rate as the leading order picture and nonlocal kinetic couplings as the quantum correction, hence leading to a rigorous separation of thermal hopping and coherent transfer useful for visualizing pathway connectivity and interference in quantum networks. As a result of these calculations, the dissipative effects of the surrounding environments can be optimized to yield the maximal efficiency, and modulation of the efficiency can be achieved using the cumulative quantum phase along any closed loops. The optimal coupling of the system and its environments is interpreted with the generic mechanisms: (i) balancing localized trapping and delocalized coherence, (ii) reducing the effective detuning via homogeneous linebroadening, (iii) suppressing the destructive interference in nonlinear network configurations, and (iv) controlling phase modulation in closed loop configurations. Though these results are obtained for simple model systems, the physics thus derived provides insights into the working of light harvesting systems, and the approaches thus developed apply to large-scale computation.
机译：在本文中，我们使用多级系统解决方案建立了最大能量传输效率的最佳条件，并通过系统映射程序生成的直观网络解释了这些解析解。映射过程将有效跳变率定义为前导图片，将非局部动力学耦合定义为量子校正，从而导致热跳变和相干传递的严格分离，可用于可视化量子网络中的路径连通性和干扰。这些计算的结果是，可以优化周围环境的耗散效应以产生最大效率，并且可以使用沿任何闭环的累积量子相位来实现效率的调制。系统及其环境之间的最佳耦合通过以下通用机制进行解释：（i）平衡局部陷井和离域相干性;（ii）通过同构线路扩展减少有效的失谐;（iii）抑制非线性网络配置中的破坏性干扰;以及（iv）在闭环配置中控制相位调制。尽管这些结果是通过简单的模型系统获得的，但由此得出的物理原理为光收集系统的工作提供了见识，因此开发的方法适用于大规模计算。

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