Abstract
Intramolecular proton transfer controlled by laser pulses was simulated. The motion of a proton in a molecule was treated by a one-dimensional, asymmetric double-well potential. To control the motion of a proton, a π-pulse approach, stimulated Raman adiabatic passage (STIRAP), and a chirping technique were applied to the system. In the π-pulse approach, the conditions of complete population inversion were determined for sequential and simultaneous irradiation of two laser fields. Similar population dynamics was obtained by a laser pulse sequence designed by global optimal control theory. The results obtained by using STIRAP and the single chirped laser pulse were compared with those obtained by using a π-pulse approach. It was found that a single negatively chirped laser pulse enables fast population transfer but maintains the robustness.
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