Percolation Threshold - Thresholds On Hyperbolic, Hierarchical, and Tree Lattices

Thresholds On Hyperbolic, Hierarchical, and Tree Lattices

Visualization of a triangular hyperbolic lattice {3,7} projected on the Poincaré disk


Depiction of the non-planar Hanoi network HN-NP


Lattice z Site Percolation Threshold Bond Percolation Threshold
Lower Upper
{4,5} hyperbolic 5 5 0.27 0.52
{7,3} hyperbolic 3 3 0.72 0.53
{3,7} hyperbolic 7 7 0.20 0.37
{∞,3} Cayley tree 3 3 1/2 1/2 1
Enhanced binary tree (EBT) 0.304(1) 0.48, 0.564(1)
Enhanced binary tree dual 0.436(1) 0.696(1)
Non-Planar Hanoi Network (HN-NP) 0.319445 0.381996
Cayley tree with grandparents 8 0.158656326

Note: {m,n} is the Shläfli symbol, signifying a hyperbolic lattice in which n regular m-gons meet at every vertex

Cayley tree (Bethe latttice) with coordination number z: pc= 1 / (z - 1)

Cayley tree with a distribution of z with mean, mean-square pc= (site or bond threshold)

Read more about this topic:  Percolation Threshold

Famous quotes containing the word tree:

    “The problems of the world, AIDS, cancer, nuclear war, pollution, are, finally, no more solvable than the problem of a tree which has borne fruit: the apples are overripe and they are falling—what can be done?... Nothing can be done, and nothing needs to be done. Something is being done—the organism is preparing to rest.”
    —David Mamet (b. 1947)