With the absorption spectrum of naphthalene properly computed, one can apply a laser-type perturbation tuned to the lowest excitation energy (i.e., 5.63 eV) of the system. As in the case of the Dirac delta pulse, one can also set the polarization of the laser field to any orientation with respect to the molecule; however, for this example on naphthalene, we have oriented the laser field in the direction of maximum polarizability to produce the maximum variation of the dipole moment as a function of time, as shown in Fig. . It can be noted from Fig. that the naphthalene molecule exhibits a linearly increasing dipole moment, as expected from a quantized system in the linear response regime that is continuously excited and in the absence of any dissipative mechanisms. As such, this can be used to check that the laser is in tune with the electronic excitation energy and that the simulation is indeed in the linear response regime.