Figure 3: Two-point cross-correlations.

(a,b) Two-dimensional representations of the experimentally derived 2-point CC Fourier components , as a function of q₁ and q₂. The data are normalized with s₀(q₁)s₀(q₂), and are shown for n=6 and n=12. (c) Two-point CCs C⁽²⁾(q₁,q_2,ψ) as a function of ψ. The (fixed) q₁ and (variable) q₂ values follow the paths of the magenta arrows in a,b for the plots in the left column, and of the black arrows in a,b for those in the right column. The spikes observed for q₁=q₂ at ψ=0, owing to noise and interparticle interference, and at ψ=π, owing only to interparticle interference, are marked with orange and red dots, respectively. (d) Diagonal 2-point CC C⁽²⁾(q₁,q_2,ψ), as a function of ψ, for different q values corresponding to the differently labelled black dots on the diagonal in a,b. The spikes are marked as described in c.