Diffusion relaxes density fluctuations toward a uniform random state whose variance in regions of volume v = l(d) scales as sigma(2)(rho) equivalent to - (2) similar to l(-d) similar to l(-d). Systems whose fluctuations decay faster, sigma(2)(rho) similar to l(-lambda) with d d + 1, a uniformity similar to random close packing and early universe fluctuations, but with arbitrary controllable density.
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