B800-B850 coherence correlates with energy transfer rates in the LH2 complex of photosynthetic purple bacteria

Physical Chemistry Chemical Physics : PCCP
Cathal SmythGregory D Scholes

Abstract

Until recently, no analytical measure of many-body delocalization in open systems had been developed, yet such a measure enables characterization of how molecular excitons delocalize in photosynthetic light-harvesting complexes, and in turn helps us understand quantum coherent aspects of electronic energy transfer. In this paper we apply these measures to a model peripheral light-harvesting complex, LH2 from Rhodopseudomonas acidophila. We find how many chromophores collectively contribute to the "delocalization length" of an excitation within LH2 and how the coherent delocalization is distributed spatially. We also investigate to what extent this delocalization length is effective, by examining the impact of bipartite and multipartite entanglement in inter-ring energy transfer in LH2.

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Citations

Aug 27, 2015·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Lipeng ChenYang Zhao
Aug 12, 2015·The Journal of Physical Chemistry Letters·Xin LiMing L Tang
Nov 2, 2019·Chemical Science·Khadga J KarkiTönu Pullerits
Aug 18, 2018·The Journal of Physical Chemistry Letters·Jerome D RoscioliWarren F Beck

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