Fig. 2.

Nonequilibrium distributions for mobility c, reduced density ρ, and the susceptibility $\chi \left(s\right)$ for cold water. (A) $-\ln P_{s,\lambda }\left(c,\rho \right)$ calculated with the mW model for $t_{\text{obs}}=300\mathrm{\Delta }t$, $s\approx s^{*}$, and $\lambda =0$ at the state point $T/T_{\text{o}}=0.8$, $p/p_{\text{o}}=1$. (B) Mean mobility and susceptibility calculated at the state point in A for different trajectory lengths, $t_{\text{obs}}$, illustrating scaling consistent with a first-order phase transition in trajectory space. The susceptibility peaks at nonequilibrium coexistence, $s=s^{*}$. (C) $-\ln P_{s,\lambda }\left(c,\rho \right)$ calculated with the mW model for $N=216$, $s\approx s^{*}$, $\lambda \approx {\lambda }^{*}$, and $t_{\text{obs}}=200\mathrm{\Delta }t$ at the state point $T/T_{\text{o}}=0.75$, $p/p_{\text{o}}={10}^4$. (D) Marginal distribution functions of ρ calculated for LDA–HDA coexistence at the state point in C. Shading indicates error estimates of 1 SD. Contours in A and C are spaced by unity, and the coloring is a guide to the eye.