Lippmann-Schwinger-Lanczos algorithm for inverse scattering problems with unknown reflectivity and loss distributions: One-dimensional Case Article Swipe

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Zimmerling, Jörn , Zaslavsky, Mikhail , Mamonov, Alexander V. , Druskin, Vladimir , Abilgazy, Anarzhan ·

YOU? · · 2025 · Open Access ·

We consider one-dimensional inverse scattering in attenuating media where both the reflectivity and loss distributions are unknown. Mathematically, this corresponds to recovering the coefficients of a damped wave operator, or equivalently, a quadratic operator pencil in the frequency domain. The Lippmann-Schwinger equation maps the unknown reflectivity and loss distribution to the measured scattered data. This mapping is nonlinear, as it requires knowledge of the internal wavefield, which itself depends on the reflectivity and loss distribution. The Lippmann-Schwinger-Lanczos method addresses this nonlinearity by approximating the internal solutions through the lifting of states from a reduced-order model constructed directly from the measured data. In this work, we extend the method to dissipative problems, enabling the approximation of internal partial differential equation (PDE) solutions in media with both reflectivity and loss distributions. We present two complementary constructions of such internal solutions: one based on spectral data and another on frequency-domain measurements over a finite interval. This development establishes a direct link between data-driven reduced-order models for inverse problems and port-Hamiltonian dynamical systems, with reduced models obtained either from the associated spectral measure or via rational approximation. Compared to the Born approximation, which replaces the internal field with the background field, our approach yields more accurate internal reconstructions and enables faster and more robust recovery of the contrast as evidenced by our numerical experiments.

Related Topics

Mathematics

Reflectance

Mathematical Analysis

Algorithm

Optics

Spectral Power Distribution

Physics

Partial Differential Equation

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Inverse scattering problem Inverse problem Mathematics Measure (data warehouse) Inverse Quadratic equation Scattering Dissipative system Reflectivity Mathematical analysis Operator (biology) Field (mathematics) Algorithm Distribution (mathematics) Nonlinear system Optics Reflection (computer programming) Spectral power distribution Born approximation Physics Partial differential equation Inversion (geology) Internal wave Scattering theory

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Landing Page: http://arxiv.org/abs/2511.15058
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Title: Lippmann-Schwinger-Lanczos algorithm for inverse scattering problems with unknown reflectivity and loss distributions: One-dimensional Case

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Publication year: 2025

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Authors: Zimmerling, Jörn, Zaslavsky, Mikhail, Mamonov, Alexander V., Druskin, Vladimir, Abilgazy, Anarzhan

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Concepts: Inverse scattering problem, Inverse problem, Mathematics, Measure (data warehouse), Inverse, Quadratic equation, Scattering, Dissipative system, Reflectivity, Mathematical analysis, Operator (biology), Field (mathematics), Algorithm, Distribution (mathematics), Nonlinear system, Optics, Reflection (computer programming), Spectral power distribution, Born approximation, Physics, Partial differential equation, Inversion (geology), Internal wave, Scattering theory

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citation_normalized_percentile.is_in_top_1_percent	False
citation_normalized_percentile.is_in_top_10_percent	True