Uniqueness for the fractional Calderón problem with quasilocal perturbations

We study the fractional Schrödinger equation with quasilocal perturbations and show that the qualitative unique continuation and Runge approximation properties hold in the assumption of sufficient decay. Quantitative versions of both results are also obtained via a propagation of smallness analysis...

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1. Verfasser: Covi, Giovanni (VerfasserIn)
Dokumenttyp: Article (Journal)
Sprache:Englisch
Veröffentlicht: 2022
In: SIAM journal on mathematical analysis
Year: 2022, Jahrgang: 54, Heft: 6, Pages: 6136-6163
ISSN:1095-7154
DOI:10.1137/22M1478641
Online-Zugang:Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1137/22M1478641
Verlag, lizenzpflichtig, Volltext: https://epubs.siam.org/doi/10.1137/22M1478641
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Verfasserangaben:Giovanni Covi

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520 |a We study the fractional Schrödinger equation with quasilocal perturbations and show that the qualitative unique continuation and Runge approximation properties hold in the assumption of sufficient decay. Quantitative versions of both results are also obtained via a propagation of smallness analysis for the Caffarelli--Silvestre extension. The results are then used to show uniqueness in the inverse problem of retrieving a quasilocal perturbation from Dirichlet-to-Neumann (DN) data under suitable geometric assumptions. Our work generalizes recent results regarding the locally perturbed fractional Calderón problem. 
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