Erratum: Viscosity and real-space molecular motion of water: Observation with inelastic x-ray scattering (Physical Review E (2018) 98 (022604) DOI: 10.1103/PhysRevE.100.039904)

We have found that we inadvertently used incorrect time-axis values for the Van Hove functions calculated from the inelastic x-ray scattering (IXS) experiment; a factor of 2 larger than the correct values. This influences the timescale in Figs. 1, 2 (left), and 4, and the parameter of decaying behaviors in Table I. The time-axis values for the Van Hove function calculated from the molecular dynamics (MD) simulation is correct and unchanged. None of the conclusions and discussion in the original paper are affected, except for the discrepancies between the values of relaxation time determined by the IXS and the MD. In the original paper, the values from IXS were almost twice as large as those from MD. The discrepancies were canceled out by using the correct timescale for the IXS. This does not affect our conclusion in the original paper but rather opens the possibility of wider use of the Van Hove function approach with the MD simulation for identifying the correlated dynamics in liquid.