2018/01/25 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 #Molecular spectroscopy and chirality #Photosynthetic Processes and Mechanisms #Spectroscopy and Quantum Chemical Studies
paper · pdf · doi:10.48550/arxiv.1801.08385
openalex publication_date 2018/01/25 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
We investigate the effect of coherence to the excitation transfer efficiency (ETE) in photosynthetic bacteria Chlorobium Tepidum. We have modeled the monomer of Fenna-Matthews-Olson (FMO) complex as consisting of eight bacteriochlorophyll-a sites, while explicitly consider reaction center core complex (RCC) as an additional site. With the use of realistic bath spectrum and several dominant vibronic modes in the non-Markovian master equation, in an effective 9-site model, we have compared the ETE for an initial pure state and an initial mixed state. We observe that the initial pure state relaxes efficiently to increase the trapping at the RCC. We further illustrate that the coherence play a competitive role to block the back transfer of excitation from RCC pigment to FMO complex and hence to maximize the ETE.