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Article Dans Une Revue J. Spectr. Theory Année : 2019

Poisson kernel expansions for Schrödinger operators on trees

Résumé

We study Schrödinger operators on trees and construct associated Poisson kernels, in analogy to the laplacian on the unit disc. We show that in the absolutely continuous spectrum, the generalized eigenfunctions of the operator are generated by the Poisson kernel. We use this to define a " Fourier transform " , giving a Fourier inversion formula and a Plancherel formula, where the domain of integration runs over the energy parameter and the geometric boundary of the tree.
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Dates et versions

hal-01383346 , version 1 (18-10-2016)
hal-01383346 , version 2 (24-08-2017)

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Nalini Anantharaman, Mostafa Sabri. Poisson kernel expansions for Schrödinger operators on trees. J. Spectr. Theory, 2019, 9, pp.243-268. ⟨10.4171/JST/247⟩. ⟨hal-01383346v2⟩
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