Electron excitation from ground state to first excited state: Bohmian mechanics method
Song Yang1, Zhao Shuang2, Guo Fu-Ming2, †, , Yang Yu-Jun2, Li Su-Yu‡,
       

(a), (b), (c), (d) and (a′), (b′), (c′), (d′) correspond to the four instants h, i, j, k shown in Fig. 7. They show the relationship between the energies and spatial positions of 2000 Bohmian trajectories.