Fig. 5.

The density of QLMs, plotted against $1/T_p$, revealing that it is controlled by a Boltzmann-like factor $e^{-E_{\mathrm{Q}\mathrm{L}\mathrm{M}}/k_B{T}_p}$, with the parent temperature playing the role of the equilibrium temperature. We find $E_{\mathrm{Q}\mathrm{L}\mathrm{M}}\approx 3.3$, expressed in terms of $k_B{T}_{\mathrm{o}\mathrm{n}\mathrm{s}\mathrm{e}\mathrm{t}}$.