  Transport phenomena in photosynthetic systems have attracted a great deal of
attention due to their potential role in devising novel photovoltaic materials.
In particular, energy transport in light-harvesting complexes is considered
quite efficient due to the balance between coherent quantum evolution and
decoherence, a phenomenon coined Environment-Assisted Quantum Transport
(ENAQT). Although this effect has been extensively studied, its behavior is
typically described in terms of the decoherence's strength, namely weak,
moderate or strong. Here, we study the ENAQT in terms of quantum correlations
that go beyond entanglement. Using a subsystem of the Fenna-Matthews-Olson
complex, we find that discord-like correlations maximize when the subsystem's
transport efficiency increases, while the entanglement between sites vanishes.
Our results suggest that quantum discord is a manifestation of the ENAQT and
highlight the importance of beyond-entanglement correlations in photosynthetic
energy transport processes.
