in the original article they clear that it isn't a photon, it is exciton that does the traveling: http://arxiv.org/pdf/1311.4688v1.pdf http://arxiv.org/pdf/131

in the original article they clear that it isn't a photon, it is exciton that does the traveling: http://arxiv.org/pdf/1311.4688v1.pdf http://arxiv.org/pdf/1311.4688v1.pdf "In these systems excitons initiated by the incoming photons should travel really fast throughout a chain of chromophores in order to reach the reaction center where they are converted to chemical energy." >loss less and super fast way for photons to traverse a random network^1. My understanding is it isn't exactly loss less. It is a trade-off. The "natural" QM way of simultaneous multi-path travel is the super fast way of finding the reaction center. The issue is that many of these multi-paths may interfere and as result some degree of "entrapment" happens significantly delaying the arrival at the reaction center (Anderson localization - on a lattice draw all possible ways from A to B, including loops, etc... and whenever paths pass through the same edge with different direction double the edge time on each path and given lattice complex enough the propagation would almost stall - very-very rough illustration). To minimize the delay, the nature seems to came up with workaround - [slightly] breaking the phases on different paths and it seems that coherence is still preserved so we still have multi-path simultaneity while the above mentioned Anderson localization is decreased because of phase mismatch. This phase breaking is result of interaction which causes some energy loss/dissipation.