Fig. 6: Violation for the second and third step.
From: Quantum walks of two correlated photons in a 2D synthetic lattice
a Plots of \({{{\mathcal{V}}}}({{{{\bf{r}}}}}_{1},{{{{\bf{r}}}}}_{2})\) with their error \({\sigma }_{{{{\mathcal{V}}}}}({{{{\bf{r}}}}}_{1},{{{{\bf{r}}}}}_{2})\) for the second and third step, for the lattice sites that satisfy the conditions explained in Supplementary Note 7. b Plots of \({{{\mathcal{V}}}}({{{{\bf{r}}}}}_{1},{{{{\bf{r}}}}}_{2})/{\sigma }_{{{{\mathcal{V}}}}}({{{{\bf{r}}}}}_{1},{{{{\bf{r}}}}}_{2})\), for those lattice sites where such quantity is positive, thus violating Eq. (5) for the second and the third step.
