Fig. 3. Experimental test of postulate I.

Triangle symbols (Δ): Measured probability distribution $P_{\mathrm{e}}(x_{\mathrm{f}},t_{\mathrm{f}})$ (ICMOS direct measurement); Circles (∘): Quantum prediction $P_{\mathrm{q}}(x_{\mathrm{f}},t_{\mathrm{f}})={\mid {\sum }_j{\mathrm{\varphi }}_j\mid }^2$; Squares ( ): Classical sum $P_{\mathrm{c}}(x_{\mathrm{f}},t_{\mathrm{f}})={\sum }_j{\mid {\mathrm{\varphi }}_j\mid }^2$. Error bars are SE of 10 measurements. The curves are theoretical predictions (solid = $P_{\mathrm{q}}^{\text{th}}$, dashed = $P_{\mathrm{c}}^{\text{th}}$). All probabilities are in arbitrary units (a.u.)