2020/07/01 by Kenneth A. Jung, Jung, Kenneth A., Paul Brumer +1
Chemistry · Neuroscience · Physics and Astronomy · #Chemical Physics (physics.chem-ph) #FOS: Physical sciences #Photochemistry and Electron Transfer Studies #Photoreceptor and optogenetics research #Spectroscopy and Quantum Chemical Studies
paper · pdf · doi:10.48550/arxiv.2007.00783
openalex publication_date 2020/07/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
The non-equilibrium stationary coherences that form in donor-acceptor systems\nare investigated to determine their relationship to the efficiency of energy\ntransfer to a neighboring reaction center. It is found that the effects of\nasymmetry in the dimer are generally detrimental to the transfer of energy.\nFour types of systems are examined, arising from combinations of localized\ntrapping, delocalized (Forster) trapping, eigenstate dephasing and site basis\ndephasing. In the cases of site basis dephasing the interplay between the\nenergy gap of the excited dimer states and the environment is shown to give\nrise to a turnover effect in the efficiency under weak dimer coupling\nconditions. Furthermore, the nature of the coherences and associated flux are\ninterpreted in terms of pathway interference effects. In addition, regardless\nof the cases considered, the ratio of the real part and the imaginary part of\nthe coherences in the energy-eigenbasis tends to a constant value in the steady\nstate limit.\n