Stability of the inverse resonance problem on the line

Details Stability of the inverse resonance problem on the line Stability of the inverse resonance problem on the line

2012-01-09

arxiv.org/abs/1201.1856v2

Physics

Mathematical Physics

21 pages

Scientific paper

In the absence of a half-bound state, a compactly supported potential of a Schr\"odinger operator on the line is determined up to a translation by the zeros and poles of the meropmorphically continued left (or right) reflection coefficient. The poles are the eigenvalues and resonances, while the zeros also are physically relevant. We prove that all compactly supported potentials (without half-bound states) that have reflection coefficients whose zeros and poles are $\eps$-close in some disk centered at the origin are also close (in a suitable sense). In addition, we prove stability of small perturbations of the zero potential (which has a half-bound state) from only the eigenvalues and resonances of the perturbation.

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