Wave operators for multi-center point interactions are shown to converge, as the potential range shrinks, to wave operators for scaled regular potentials, with couplings determined by the resonance data of each potential.
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On the approximation by regular potentials of Schr\"odinger operators with point interactions
Wave operators for multi-center point interactions are shown to converge, as the potential range shrinks, to wave operators for scaled regular potentials, with couplings determined by the resonance data of each potential.