Influence of a structured environment on the energy transfer in molecular assemblies: An approach based on Stochastic Schrödinger equations

分子组合体中激发能的传递在生物、化学和技术的许多领域都起着重要的作用。突出的例子是由有机染料组成的光合作用复合物或聚集体，用于摄影或有机太阳能电池。在这种分子聚集体中，由于共振偶极子-偶极子相互作用，电子激发可以从一个分子转移到另一个分子。这种转移的特征受到与周围环境相互作用的强烈影响：随着相互作用的增加，它从相干量子力学传播转变为经典扩散过程。在该项目中，我们将研究具有记忆的结构化环境对各种系统中能量转移的特征和效率的影响。为了适当地考虑由于环境记忆引起的非马尔可夫动力学，我们应用了stochasticSchrödinger方程理论的新方法。用这种方法，我们将研究从相干转移到非相干Förster跳变的转变。然而，主要的焦点将是使用定制的环境来操纵传输效率和控制能量转移的方向。

The transport of excitation energy in assemblies of molecules plays animportant role in many parts of biology, chemistry and technology.Prominent examples are the photosynthetic complexes or aggregates consistingof organic dyes, which are used in photography or organic solar cells. In such molecular aggregates electronic excitation can be transferred from onemolecule to the other due to resonant dipole-dipole interaction.The character of this transfer is strongly influenced by interactions with thesurroundings: with increasing interaction it changes from a coherentquantum mechanical propagation to a classical diffusion process.In the project we will investigate the influence of a structured environmentwhich possesses a memory, on the character and efficiency of the energy transferin various systems.To take the non-Markovian dynamics due to the memory of the surroundingsproperly into account we apply new approaches from the theory of stochasticSchrödinger equations.With this methods we will investigate the transition from coherent transfer toincoherent Förster hopping. The main focus, however, will be to use tailored environments to manipulate the transport efficiency and to control the direction ofenergy Transfer.