Fig. 6.

Spectral overlap and cross-spectra between $Q_1^{*}$ and the rest of the backward modes for a more (A) and less (B) coherent oscillator. Spectrum of eigenvalues (Left), power spectrum S_λ of different eigenmodes (Mid), and the cross-spectra between $Q_1^{*}$ and different eigenmodes (Right). SNIC model with parameters in A and B as in Figs. 1 and 2, respectively.