Figure 8

Spectral density of eigenvalues for \(\xi =2\), \(\bar{n}=4\), \(\sigma _{n}=1\). Top left. For the matrix \({\mathcal {W}}\) (density estimated over \(10\text{,}000\) samples), density is represented in colour plots, in log scale. The colour bar refers to powers of 10. Top right. Spectral density of \({\mathcal {L}}\) for \(w=0.05\). Bottom left. Spectral density of \({\mathcal {L}}\) for \(w=0.1\). Bottom right. Spectral density of \({\mathcal {L}}\) for \(w=0.15\). Unstable eigenvalues are on the right to the vertical dashed line \(x=0\)