title: Multipartite quantum entanglement evolution in photosynthetic complexes.
abstract: We investigate the evolution of entanglement in the Fenna-Matthew-Olson (FMO) complex based on simulations using the scaled hierarchical equations of motion approach. We examine the role of entanglement in the FMO complex by direct computation of the convex roof. We use monogamy to give a lower bound for entanglement and obtain an upper bound from the evaluation of the convex roof. Examination of bipartite measures for all possible bipartitions provides a complete picture of the multipartite entanglement. Our results support the hypothesis that entanglement is maximum primary along the two distinct electronic energy transfer pathways. In addition, we note that the structure of multipartite entanglement is quite simple, suggesting that there are constraints on the mixed state entanglement beyond those due to monogamy.
authors.affiliation: Department of Chemistry and Birck Nanotechnology Center, Purdue University, West Lafayette, Indiana 47907, USA.
authors.forename: Jing
authors.initials: J
authors.lastname: Zhu
authors.forename: Sabre
authors.initials: S
authors.lastname: Kais
authors.forename: Alán
authors.initials: A
authors.lastname: Aspuru-Guzik
authors.forename: Sam
authors.initials: S
authors.lastname: Rodriques
authors.forename: Ben
authors.initials: B
authors.lastname: Brock
authors.forename: Peter J
authors.initials: PJ
authors.lastname: Love
mesh_terms: D045342:Light-Harvesting Protein Complexes / Q000737:chemistry* / Q000378:metabolism; D010788:Photosynthesis; D011789:Quantum Theory
chemical_list: D045342:Light-Harvesting Protein Complexes