Semiclassical techniques classical solution

It is not the aim of this book to give a full account of the present stage of the collision and statistical theory by considering all various approaches to the solution of the dynamic problems involved. Instead, it attempts to present a detailed discussion of the relations between both theories from a unified point of view. Therefore, attention is paid not so much to computational techniques as to the fundamental aspects of the problem. Their complete elucidation is possible only by means of exact definitions of the concepts and by accurate formulations of the theories. Computational approaches are certainly of great importance for the practical application of any physical theory. In particular, the physical chemist is much interested in how to calculate the reaction velocities, which requires an estimation of various parameters entering the rate equations. Very often, however, we ask about the procedure of evaluating some quantities which are not well defined, for instance, the quantum correction to a classical (or semiclassical), collision or statistical theory. As a consequence, large discrepancies between the results of different approaches arise mainly... 

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