Exploring quantum efficiency in cyanobacterial photosystem I: Influence of chlorophyll positioning and dissipation rates

The efficiency of excitation energy transfer in photosystems can be quantified by the quantum efficiency q, defined as the fraction of incident excitation energy that initiates charge separation at the photosynthetic reaction-center. This efficiency can be calculated from a rate matrix that governs the stochastic migration of chlorophyll excitations within the photosystem.