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First passage percolation: Scaling and critical exponents

1984; American Physical Society; Volume: 30; Issue: 7 Linguagem: Inglês

10.1103/physrevb.30.4038

1095-3795

Amy Lisa Ritzenberg, Richard J. Cohen,

stochastic dynamics and bifurcation

Motivated by a percolation analysis of neural conduction, we write a scaling form for the expected length of the shortest path between two sites in the infinite cluster. $\ensuremath{\psi}$ is the fractal dimension of this path over distances small compared to a correlation length. Over long distances, path "tortuosity" and effective conduction velocity scale with a new critical exponent $\ensuremath{\theta}$. The scaling argument provides the first analytic expression for an effective velocity in a "first passage" percolation problem.