Multipartite quantum entanglement evolution in photosynthetic complexes

Jing Zhu, Birck Nanotechnology Center, Purdue University
Sabre Kais, Birck Nanotechnology Center, Purdue University
Alan Aspuru-Guzik, Harvard University
Sam Rodriques, Haverford College
Ben Brock, Haverford College
Peter J. Love, Haverford College

Date of this Version



The Journal of Chemical Physics 137, 074112 (2012); doi: 10.1063/1.4742333


Copyright (2012) American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics. The following article appeared in J. Chem. Phys. 137, 074112 (2012) and may be found at The following article has been submitted to/accepted by The Journal of Chemical Physics . Copyright (2012) Jing Zhu, Sabre Kais, Alán Aspuru-Guzik, Sam Rodriques, Ben Brock and Peter J. Love. This article is distributed under a Creative Commons Attribution 3.0 Unported License.


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. (C) 2012 American Institute of Physics. []


Nanoscience and Nanotechnology