I discuss the modeling of energy flow in photosynthetic apparatus, with an emphasis on the comparison of theoretical predictions for time and frequency resolved spectroscopy with experimental data. Using an efficiently accelerated implementation of the hierarchical equations of motion (HEOM) method allows one to discuss different light harvesting systems with different couplings of electronic and vibrational degrees of freedom [2] and to elucidate the excitation pathways.

References:
[1] Kramer, T., & Rodriguez, M. (2017). Two-dimensional electronic spectra of the photosynthetic apparatus of green sulfur bacteria. Scientific Reports, 7, 45245.
[2] Reimers, Jeffrey R., et al. "Challenges facing an understanding of the nature of low-energy excited states in photosynthesis." Biochimica et Biophysica Acta (BBA)-Bioenergetics 1857.9 (2016): 1627-1640.