Quantum mechanical theory of molecular collisions in a laser field

Abstract
The effect of a radiation field on (ion)atom–(di)atom collision systems is considered. A detailed derivation is presented for the modified coupled equations that result from adding the field to the coupled channel formalism for nonreactive collisions. A discussion of the coherent state in this context concludes that the number state representation of the field offers a more convenient basis for defining probability channels in the combined system, but that further research on the applicability of the coherent state in more approximate treatments of the system should be carried out. An example of the general formalism is worked out for collinear Br+H2 collisions in the presence of the field, and calculated results are presented. Comparison is made with the results obtained from a vibronic (resonance) model.