Renormalized spectrum of quasiparticle, strongly interacting with multi-mode phonons at T=0K

Сalculation data of the renormalized spectrum and average number of phonons in the one-mode (fig.1), two-mode (fig.2, fig.3) and three-mode (fig.4) systems. Figures (1-4) and their captions are given in the file Figures.pdf