Coherent exciton transport on scale-free networks

Details Coherent exciton transport on scale-free networks Coherent exciton transport on scale-free networks

Dec 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008njph...10l3012x&link_type=abstract

New Journal of Physics, Volume 10, Issue 12, pp. 123012 (2008).

Physics

2

Scientific paper

The coherent exciton transport on a class of deterministic and random scale-free networks (DSFNs and RSFNs) generated by simple rules is studied in this paper. The coherent exciton dynamics is modeled by continuous-time quantum walks, and we calculate the transition probabilities between two nodes of the networks. We find that the transport depends on the initial nodes of the excitation. For DSFNs, the probabilities of finding the excitation at the initial central nodes are nearly periodic, in contrast to the flat behavior found for RSFNs. In the long time limit, the transition probabilities on DSFNs show characteristic patterns with identical values. For RSFNs, we find that the excitation is most likely to be found at the initial nodes with high connectivity. All these features of quantum transport are significantly different from those of the classical transport modeled by continuous-time random walks.

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