In the context of photosynthetic light-harvesting complexes, how does the spatial arrangement of chromophores contribute to maintaining exciton coherence?

The spatial arrangement of chromophores, which are light-absorbing molecules like chlorophylls and carotenoids, within photosynthetic light-harvesting complexes is crucial for maintaining exciton coherence. Excitons are quasiparticles representing an excited electronic state that can move through the complex. The precise positioning of chromophores influences the electronic coupling between them. Strong electronic coupling allows for the coherent delocalization of excitons across multiple chromophores, enabling the system to exp....