2007 | OriginalPaper | Chapter
Block Operator Matrices, Optical Potentials, Trace Class Perturbations and Scattering
Authors : Jussi Behrndt, Hagen Neidhardt, Joachim Rehberg
Published in: Operator Theory in Inner Product Spaces
Publisher: Birkhäuser Basel
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For an operator-valued block-matrix model, which is called in quantum physics a Feshbach decomposition, a scattering theory is considered. Under trace class perturbations the channel scattering matrices are calculated. Using Feshbach’s optical potential it is shown that for a given spectral parameter the channel scattering matrices can be recovered either from a dissipative or from a Lax-Phillips scattering theory.