TY - JOUR
T1 - Transport in weighted networks
T2 - Partition into superhighways and roads
AU - Wu, Zhenhua
AU - Braunstein, Lidia A.
AU - Havlin, Shlomo
AU - Stanley, H. Eugene
PY - 2006/4/14
Y1 - 2006/4/14
N2 - Transport in weighted networks is dominated by the minimum spanning tree (MST), the tree connecting all nodes with the minimum total weight. We find that the MST can be partitioned into two distinct components, having significantly different transport properties, characterized by centrality-the number of times a node (or link) is used by transport paths. One component, superhighways, is the infinite incipient percolation cluster, for which we find that nodes (or links) with high centrality dominate. For the other component, roads, which includes the remaining nodes, low centrality nodes dominate. We find also that the distribution of the centrality for the infinite incipient percolation cluster satisfies a power law, with an exponent smaller than that for the entire MST. The significance of this finding is that one can improve significantly the global transport by improving a tiny fraction of the network, the superhighways.
AB - Transport in weighted networks is dominated by the minimum spanning tree (MST), the tree connecting all nodes with the minimum total weight. We find that the MST can be partitioned into two distinct components, having significantly different transport properties, characterized by centrality-the number of times a node (or link) is used by transport paths. One component, superhighways, is the infinite incipient percolation cluster, for which we find that nodes (or links) with high centrality dominate. For the other component, roads, which includes the remaining nodes, low centrality nodes dominate. We find also that the distribution of the centrality for the infinite incipient percolation cluster satisfies a power law, with an exponent smaller than that for the entire MST. The significance of this finding is that one can improve significantly the global transport by improving a tiny fraction of the network, the superhighways.
UR - http://www.scopus.com/inward/record.url?scp=33645789735&partnerID=8YFLogxK
U2 - 10.1103/PhysRevLett.96.148702
DO - 10.1103/PhysRevLett.96.148702
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C2 - 16712129
AN - SCOPUS:33645789735
SN - 0031-9007
VL - 96
JO - Physical Review Letters
JF - Physical Review Letters
IS - 14
M1 - 148702
ER -