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Generic simplicity of resonances. (English) Zbl 0844.47040

Summary: We prove that a generic potential perturbation in Euclidean scattering splits the multiplicities of all resonances. Our argument can in fact be generalized to a class of non-selfadjoint Fredholm operators on an abstract Hilbert space.

MSC:

47N50 Applications of operator theory in the physical sciences
47A40 Scattering theory of linear operators
47A53 (Semi-) Fredholm operators; index theories
81U10 \(n\)-body potential quantum scattering theory