At the end of the simulation the TD-ADGA has requested a total of 1585 SPs. Compared to the 2052 SPs requested by the TI-ADGA calculation used to obtain the reference PES, the TD-ADGA provides a reduction of 22.30%. Fig. shows the expectation value of the displacement coordinate for modes q 0 and q 1 (symmetric bend and symmetric stretch), as well as the perturbation parameter of the perturbing pulse during the three simulations. The expectation value of the q 2 mode is not shown since the changes observed are on the order of magnitude of 10 -4 a.u. in the displacement coordinate. The lack of large oscillations in the q 2 mode shows that there is no strong coupling between the symmetric bend (q 0 ) and the asymmetric stretch modes, when the former is excited using the present perturbation. For all simulations, it is observed from Fig. that as the perturbation increases in amplitude, both small and large period oscillations are induced in the q 0 mode. These oscillations persist throughout the rest of the simulation time. Shortly delayed after the initial oscillations in the q 0 mode are observed, oscillations are induced in the q 1 mode which also continues through the rest of the simulation. This redistribution of energy is to be expected since both q 0 and q 1 are totally symmetric.