Abstract
In this work, we study environment-assisted excitation energy transfer (EET) through calculating energy transfer efficiency (ETE) in LH1-RC-type and LH2-type trimers, which can be used to mimic energy transfer behaviors in the basic unit cells of LH1-RC and LH2 light-harvesting complexes. Quantum state evolution of the trimers is described by a non-Hermitian quantum master equation. ETE in these trimer systems is investigated by the use of numerical solutions at finite temperatures for the non-Hermitian master equation. We theoretically reveal the temperature-assisted ETE enhancement. It is found that highly efficient EET with nearly unit efficiency may occur in the nearby regime of the critical point of quantum phase transition. excitation energy transfer, LH1-RC-type and LH2-type trimers, quantum phase transition
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