TY - GEN A1 - Behrndt, Jussi A1 - Neidhardt, Hagen A1 - Rehberg, Joachim T1 - Block operator matrices, optical potentials, trace class perturbations and scattering N2 - For an operator-valued block-matrix model, which is called in quantum physics a Feshbach decomposition, a scattering theory is considered. Under trace class perturbation 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. KW - Feshbach decomposition KW - optical potential KW - Lax-Phillips scattering theory KW - dissipative scatteringtheory KW - scattering matrix KW - characteristicfunction KW - dissipative operators Y1 - 2008 UR - https://opus4.kobv.de/opus4-matheon/frontdoor/index/index/docId/457 UR - https://nbn-resolving.org/urn:nbn:de:0296-matheon-4570 ER -