2017/11/14 by Davinder Singh, Shubhrangshu Dasgupta, Singh, Davinder +1
Biochemistry, Genetics and Molecular Biology · Chemistry · Physics and Astronomy · #Biological Physics (physics.bio-ph) #FOS: Physical sciences #Photochemistry and Electron Transfer Studies #Photosynthetic Processes and Mechanisms #Spectroscopy and Quantum Chemical Studies
paper · pdf · doi:10.48550/arxiv.1711.05054
openalex publication_date 2017/11/14 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
The excitation energy transfer (EET) in Fenna-Matthews-Olson (FMO) complex has been investigated in the presence of realistic inhomogeneous protein environment around different bacteriochlorophyll-a (BChla) sites of a 8-site monomer. We studied the effect of initial coherence and the 8th chromophore on the EET dynamics considering relative orientation of transition dipole moments of all the BChla sites. We choose femtosecond coherent laser pulse to prepare initial coherent superposition state. Our non-Markovian simulation reveals that the initial coherence between excited states of BChla sites accelerate the excitation energy transfer process as compared to initial mixed state. Even more impressively, in the presence of the 8th chromophore, the initial pure state relaxes much faster than in the 7-site monomer. Hence the inclusion of 8th chromophore additionally enhances the EET relaxation.