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Designing Laser Pulses to Control Molecular Motion

Q. Ren, G.G. Balint-kurti, F.R. Manby, M. Artamonov, T-S. Ho and H. Rabitz
University of Bristol, UK

Keywords:
optimal control, rovibrational excitation, Ultrocold molecule

Abstract:
A new method for incorporating polarization effects of the strong electric field into optimal control calculations is presented. A Born-Oppenheimer-type separation, referred to as the Electric-Nuclear Born-Oppenheimer approximation, is introduced in which both the nuclear motion and the fluctuations of the external electric field are assumed to be slow as compared with the speed at which the electronic wavefunction responds to these changes. This assumption permits the generation of a potential energy surface that depends not only on the geometry of the nuclei, but also on the electric field strength and on the orientation of the molecule with respect to the electric field. As an illustration, it is applied to the optimal control of the vibrational and rotational excitation in hydrogen molecules.

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