FIG. 3.

(a) The vibrational density of states (VDOS) $D\left({\omega }_n\right)$, where ${\omega }_n$ is the frequency, of the ${\mathrm{C}}_{\alpha }$ atoms in the HS+HP model at $T/{ϵ}_r={10}^{-8}$ for all $\alpha$ and $\beta$ in Fig. 2. (b) Participation ratio $p_r\left({\omega }_n\right)$ plotted versus ${\omega }_n$. The average total nonbonded repulsive potential energy per atom $⟨V_r/N⟩$ increases from blue to red on a logarithmic scale.