  The long-standing problem of nearly perfect photosynthetic yield in some
types of bacteria and nearly all kinds of plants despite the interaction with a
hot and noisy environment has witnessed quantum optical explanations in the
last decade or so. Typically in these explanations, photosynthetic reaction
centers are modeled as five-level quantum heat engines where the generation of
Fano-type interference due to the coupling of discrete state transitions with a
common Markovian reservoir is held responsible for the enhancement of the
photosynthetic efficiency. In this work, we go beyond the Born-Markov
approximation used in the earlier works and study the impact of non-Markovian
environments with Lorentzian spectral densities on the dynamics of
light-harvesting complexes.
