  The quantum dynamics of entanglement is widely revealed in photosynthetic
light-harvesting complexes. Different from the previous work, we explore the
properties of exciton transport and photosynthesis assisted by the quantum
entanglement in two adjacent pigment molecules, which are measured by the
population dynamics behaviors, the $j$-$V$ characteristics and by the output
power via a photosynthetic quantum heat engine (QHE) model. A more robust
exciton transport dynamic behavior is compared with those without quantum
entanglement, and the photosynthetic characteristics evaluated by the output
current and power were proved to be enhanced by the quantum entanglement at
different ambient temperatures. These results may point toward the possibility
for artificial photosynthetic nanostructures inspired by this quantum
biological systems.
