Applying a laser perturbation at different nuclear time steps leads to different initial conditions for each time step. Each of these initial conditions can now be treated as equivalent to a different trajectory as each of these initial conditions will evolve independently of the other. Within each trajectory, we can thus group together all the quantum states after the application of laser perturbation at a certain time step as different columns of the batch matrix, {|Ψ⟩} , for i th trajectory, to construct a matrix of size K × T