The application of complex absorbing potentials to an invariant embedding scattering method: I. Theory and computational details

Abstract
In this article, an extension of quantum scattering methods based on propagative R-matrix techniques to deal with negative imaginary potentials is presented. Reactive probabilities can be then obtained, considering only the reactants arrangement channel and Jacobi coordinates. It has been necessary to generalize the R-matrix propagation method, in order to consider the complex-valued nature of the interaction matrix. The new formulation has been particularized, in the present case, to the Infinite-Order Sudden Approximation, for which several results, focusing on the reliability and numerical performances of the method, will be shown.

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