(1). Ehrenfest Dynamics is equivalent to use r s = 1 (s = Q method) for the EOMs (Eq. 118 and Eq. 119), and the focused initial conditions in Eq. 82 with γ = 0 (corresponding to r s = 1). The original Ehrenfest dynamics also enforces all angles φ n in Eq. 122 to be zero. However, having a random distribution in φ n (Eq. 122) or in ϕ n Eq. 120b does not influence the numerical results, based on the calculations of model systems we explored in this work.