Criteria for the reduction of the effective manifold of states in models of laser-induced dissociation and chemistry

Abstract
A laser-driven molecular species A, represented as a two-level system, is taken to react forming a finite-level molecular species B. Criteria are developed that, when satisfied, enable this model to be approximated by a two-level molecular A system reacting to form a single-level molecular species B. Further criteria are then developed that, when satisfied, enable this model to be approximated by a two-level molecular species A with irreversible population loss.