Fig. 2.

MD simulation of the THz Kerr effect in water. Value of (a) 〈cos (θ)〉(t) and b 〈cos² (θ)〉(t) during the non-equilibrium MD simulation of water. For comparison, the THz pump pulse profiles employed in the experiment and the simulations are shown as black dashed and dotted lines, respectively. θ is the angle of the water dipoles with respect to the field polarization u_z. $⟨\dots ⟩$ represents the ensemble average over all molecules in the system and all trajectories employed