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Computing Scattering Resonances

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arxiv 2006.03368 v1 pith:Z34NGNPM submitted 2020-06-05 math.SP math-phmath.MP

classification math.SPmath-phmath.MP
keywords potentialonlyrequiredresonancesscatteringaccessaddressedalgorithm
verification ladder T0 review T1 audit T2 compute T3 formal

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abstract

The question of whether it is possible to compute scattering resonances of Schr\"odinger operators - independently of the particular potential - is addressed. A positive answer is given, and it is shown that the only information required to be known a priori is the size of the support of the potential. The potential itself is merely required to be $\mathcal{C}^1$. The proof is constructive, providing a universal algorithm which only needs to access the values of the potential at any requested point.

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Forward citations

Cited by 3 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. On the computation of geometric features of spectra of linear operators on Hilbert spaces

    math.SP 2019-08 conditional novelty 8.0 of 10

    First algorithms and solvability-complexity classifications for computing Lebesgue measure, capacity, and fractal dimensions of spectra of infinite-dimensional linear operators.

  2. Computing Spectral Measures and Spectral Types

    math.SP 2019-08 conditional novelty 8.0 of 10

    First general algorithms compute spectral measures, point/continuous/singular decompositions, functional calculus, and Radon-Nikodym derivatives for self-adjoint or unitary operators with known column decay, with Solv...

  3. The foundations of spectral computations via the Solvability Complexity Index hierarchy

    math.SP 2019-08 accept novelty 7.0 of 10

    Sharp Solvability Complexity Index classifications are established for spectra of unbounded differential and graph operators, the spectral gap problem, and discrete spectra, with constructive algorithms realizing the ...

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