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Scattering theory for difference equations with operator coefficients

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arxiv 2501.11194 v1 pith:JTNV5Y4M submitted 2025-01-19 math.SP

Scattering theory for difference equations with operator coefficients

classification math.SP
keywords coefficientsdifferencediscretehilbertscatteringspaceassociatedbi-infinite
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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We consider a second order difference equation with operator-valued coefficients. More precisely, we study either compact or trace class perturbations of the discrete Laplacian in the Hilbert space of bi-infinite square-summable sequence with entries in a fixed Hilbert space. We discuss its continuous and discrete spectrum, as well as properties of the associated scattering matrix.

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  1. Factorization for the matrix-valued general Jacobi system on the full-line lattice

    math-ph 2025-11 unverdicted novelty 6.0

    A factorization formula expresses the matrix-valued transmission and reflection coefficients for the full-line lattice in terms of the scattering coefficients for its left and right fragments.