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arXiv 1002.2843physics.chem-phphysics.bio-ph
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弱耦合激子复合物中的退相干

Decoherence in Weakly Coupled Excitonic Complexes

Tomas Mancal, Vytautas Balevicius, Leonas Valkunas

摘要:

导出了弱耦合激子复合物的运动方程。该描述允许处理系统的基础上的电子状态本地化的个别发色团,而在同一时间占实验观察到的离域效应的光谱。该方程被证明是相关的著名的Foerster型能量传递速率方程,但不像Foerster方程,他们提供了一个描述的退相干过程,导致抑制的共振耦合浴波动。线性吸收和二维光子回波相关谱计算的简单模型系统在均匀的限制,表现出明显的离域效应和减少的共振耦合由于与浴相互作用。

英文摘要:

Equations of motion for weakly coupled excitonic complexes are derived. The description allows to treat the system in the basis of electronic states localized on individual chromophores, while at the same time accounting for experimentally observable delocalization effects in optical spectra. The equations are show to be related to the well-known Foerster type energy transfer rate equations, but unlike Foerster equations, they provide a description of the decoherence processes leading to suppression of the resonance coupling by bath fluctuations. Linear absorption and two-dimensional photon echo correlation spectra are calculated for simple model systems in homogeneous limit demonstrating distinct delocalization effect and reduction of the resonance coupling due to interaction with the bath.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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