Phonon-assisted excitation energy transfer in photosynthetic systems
Chen Hao, Wang Xin, Fang Ai-Ping†, , Li Hong-Rong‡,
       

Configurations of the energy levels and transitions. The red (dashed) arrow lines represent the original detuned energy transfer process which hardly succeed due to the mismatched energy levels. The blue (solid) arrow lines show the phonon-assisted energy transfer process.