Theory of Molecular Collisions in the Presence of a Laser Field,
ROCHESTER UNIV N Y DEPT OF CHEMISTRY
Pagination or Media Count:
The reaction dynamics and mechanism of energy transfer in a gas-phase molecular collision system can be dramatically affected by an intense, external laser field. A rigorous theoretical treatment must consider explicitly the interaction of the field with the collision dynamics, where the absorption and emission of radiation and the molecular collision are viewed as a single process rather than separate, independent processes. The full quantum mechanical formulation yields a set of coupled equations, where the number of equations corresponds to the number of asymptotic channels. A semiclassical formulation of the molecular dynamics involves the propagation of classical trajectories and their corresponding actions for nuclear motion on electronic-field potential surfaces, where each electronic-field surface depends on field-free, adiabatic electronic surfaces and radiative coupling. Transitions between electronic-field surfaces are effected by trajectories propagating through intersection points between the surfaces analytically continued into the complex plane.
- Lasers and Masers
- Nuclear Physics and Elementary Particle Physics