Disorder-Assisted Exciton Transport
T. Scholak, T. Zech, T. Wellens and A. Buchleitner
Physikalisches Institut der Albert-Ludwigs-Universit├Ąt, Hermann-Herder-Str. 3, D-79104 Freiburg, Germany
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We discuss the possibly constructive role of disorder for the optimization of exciton transport in the FMO (Fenna-Matthews-Olson) light harvesting complex. Our analysis, which models the FMO as a 3D random graph, demonstrates the existence of a small fraction of optimal, though highly asymmetric, non-periodic conformations, which yield near-to-optimal coherent excitation transport. We argue that, on transient time scales, such quantum interference enhanced transport does always better than stochastic activation.
DOI: 10.12693/APhysPolA.120.A-89
PACS numbers: 87.15.hj, 05.60.Gg, 03.65.Ud, 03.65.Yz