To quantify exciton rotation within the cyclic circuit, we calculate the normalized flux using Eq. 18 for the clockwise path: F 23 , F 31 and F 12 . Furthermore, we define the total clockwise flux through site i as F i = F ji -F ik , where j and k are the two sites neighboring site i. The calculated fluxes are plotted in Fig. . For the three-chromophore cycle the condition F mn = -F nm holds for any given site, but the total flux coming in and out of the site is not necessarily equivalent. For example, for site 1 (i.e., linear chromophore a), the net clockwise flux is given by F 1 = F 12 -F 31 ̸ = 0. However, because the construct is a closed ring and it is isolated from the environment, the sum of the net clockwise flux for all three sites must vanish by definition.