Fast and Slow Dynamics of Hydrogen Bonds in Liquid Water

We study hydrogen-bond dynamics in liquid water at low temperatures using molecular dynamics simulations, and find results supporting the hypothesized continuity of dynamic functions between the liquid and glassy states of water. We find that average bond lifetime (1ps) has Arrhenius temperature dependence. We also calculate the bond correlation function decay time (1ns) and find power-law behavior consistent with the predictions of the mode-coupling theory, suggesting that the slow dynamics of hydrogen bonds can be explained in the same framework as standard transport quantities.