Fenna-Matthews-Olson (FMO) energy transfer

The Fenna-Matthews-Olson (FMO) complex is the well-studied photosynthetic pigment-protein assembly in green sulphur bacteria in which excitonic energy migrates from antenna to reaction centre with near-unity efficiency, partly via quantum-coherent pathways. ATH adopts FMO as the established physical analogy for its QCM hypothesis: that mature, multi-species phototrophic biofilms on buildings may achieve comparable coherence and energy-transfer efficiency, explaining their extreme resilience. It is the real-science foundation that grounds the framework's quantum-biofilm strand.