Abstract- In this work, an exact analytical approach for the dynamics of excitation energy transfer and quantum entanglement in a photosynthetic dimer system is presented. In this approach, the protein environment is investigated as non-Markovian stochastic noise around each pigment molecule. The exact analytical expressions for the population of two pigments and their quantum entanglement is obtained. It is shown that numerical results have a good matching with the experimental results at cryogenic and physiological temperatures.

Keywords: Excitation energy transfer, quantum entanglement, Pigment-protein complex system, photosynthetic dimer system.

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