Controlling dissociation by trapping trajectories in highly energetic states

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De Almeida, A. K. [UNESP]
Egydio De Carvalho, R. [UNESP]
De Lima, E. F.
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We consider the non-linear dynamics of a polar diatomic molecule under the action of laser-field interactions and in the presence of a dissipation mechanism, described by the classical damped and driven one-dimensional Morse oscillator. In the absence of laser fields and dissipation, the phase space consists of a negative-energy bound region and a positive-energy dissociative region. Laser-molecule interaction changes the phase space allowing transitions from the bound to the dissociative region through chaotic routes. We show that for a spatially dependent dipole force, resonances with positive energies allow the trapping of trajectories in pseudo-bound states. We also show that, upon the introduction of dissipation, there exist non-trivial point attractors as well as chaotic attractors, which capture the trajectories in pseudo-bound states. Consequently, in addition to the parameters associated with the laser-molecule interaction, the amplitude of the dissipation acts as a control parameter of the photo-dissociation dynamics.
Attractors, Dissipation, Dissociation, Morse potential, Non-linear resonance
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Physica A: Statistical Mechanics and its Applications, v. 449, p. 101-110.