Localization of coherent exciton transport in phase space
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We study numerically the dynamics of excitons on discrete rings in the presence of static disorder. Based on continuous-time quantum walks we compute the time evolution of the Wigner function (WF) both for pure diagonal (site) disorder, as well as for diagonal and off-diagonal (site and transfer) disorder. In both cases, large disorder leads to localization and destroys the characteristic phase space patterns of the WF found in the absence of disorder.
8 pages, 9 figures. slight revision of the text and addition of a new figure. to be published in Phys. Rev. E
8 pages, 9 figures. slight revision of the text and addition of a new figure. to be published in Phys. Rev. E