In photosynthetic organisms the energy of the illuminating light is absorbed by the antenna complexes and transmitted by the excitons to the reaction centers (RCs). The energy of light is either absorbed by the RCs, leading to their “closing” or is emitted through fluorescence. The dynamics of the light absorption is described by a simple model developed for exciton migration that involves the exciton hopping probability and the exciton lifetime. During continuous illumination the fraction of closed RCs $x$ continuously increases, and at a critical threshold $x_c$, a percolation transition takes place. Performing extensive Monte Carlo simulations, we study the properties of the transition in this correlated percolation model. We measure the spanning probability in the vicinity of $x_c$, as well as the fractal properties of the critical percolating cluster, both in the bulk and at the surface.

中文翻译：

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光合细菌模型中渗滤团的统计

在光合生物中，照明光的能量被天线复合体吸收，并被激子传输到反应中心（RCs）。光的能量要么被RC吸收，导致其“关闭”，要么通过荧光发出。通过为激子迁移建立的简单模型来描述光吸收的动力学，该模型涉及激子跳跃概率和激子寿命。在连续照明期间，封闭式RC的比例$X$ 不断增加，并处于临界阈值 $X_C$，发生渗滤过渡。通过执行广泛的蒙特卡洛模拟，我们研究了这种相关渗滤模型中跃迁的性质。我们测量在附近的跨越概率$X_C$以及临界渗流团簇的分形特性（无论是在本体还是在表面）。