Fig. 3.
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TEST1: Mean auto-correlation ξ(n) as a function of lag, n, for a chain of length of M ≈ 1000, evaluated over 104 randomly selected voxels. The red curve shows the ensemble average, ⟨ξ(n)⟩, across parameters, with the shaded band indicating the ±1σ dispersion. The horizontal dashed line marks the threshold, ξ = 0.1, used to assess mixing efficiency.
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