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An investigation into the energy transfer efficiency of a two-pigment photosynthetic system using a macroscopic quantum model

Ghasemi, F ; Sharif University of Technology | 2020

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  1. Type of Document: Article
  2. DOI: 10.1016/j.biosystems.2020.104209
  3. Publisher: Elsevier Ireland Ltd , 2020
  4. Abstract:
  5. Despite several different measures of efficiency that are applicable to the photosynthetic systems, a precise degree of efficiency of these systems is not completely determined. Introducing an efficient model for the dynamics of light-harvesting complexes in biological environments is a major purpose in investigating such systems. Here, we investigate the effect of macroscopic quantum behavior of a system of two pigments on the transport phenomena in this system model which interacts with an oscillating environment. We use the second-order perturbation theory to calculate the time-dependent population of excitonic states of a two-dimensional Hamiltonian using a non-master equation approach. Our results demonstrate that the quantum efficiency is robust with respect to the macroscopicity parameter h˜ solely, but the ratio of macroscopicity over the pigment-pigment interaction energy can be considered as a parameter that may control the energy transfer efficiency at a given time. So, the dynamical behavior and the quantum efficiency of the supposed photosynthetic system may be influenced by a change in the macroscopic behavior of the system. © 2020 Elsevier B.V
  6. Keywords:
  7. Energy transfer efficiency ; Photosynthesis ; Quantum efficiency ; Energy efficiency ; High energy environment ; Numerical model ; Pigment ; Time dependent behavior ; Two-dimensional modeling ; Analytical parameters ; Article ; Energy transfer ; Equipment design ; Excitation ; Light harvesting system ; Mathematical analysis ; Oscillation ; Quantum mechanics
  8. Source: BioSystems ; Volume 197 , 2020
  9. URL: https://www.sciencedirect.com/science/article/abs/pii/S0303264720301027