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Recovering simultaneously a potential and a point source from Cauchy data

Abstract : This paper is devoted to the inverse problem of recovering simultaneously a potential and a point source in a Schrödinger equation from the associated nonlinear Dirichlet to Neumann map. The uniqueness of the inversion is proved and logarithmic stability estimates are derived. It is well known that the inverse problem of determining only the potential while knowing the source, is ill-posed. In contrast the problem of identifying a point source when the potential is given is well posed. The obtained results show that the nonlinear Dirichlet to Neumann map contains enough information to determine simultaneously the potential and the point source. However recovering a point source imbedded in an unknown background medium becomes an ill-posed inversion.
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Contributor : Faouzi Triki Connect in order to contact the contributor
Submitted on : Saturday, March 12, 2022 - 11:04:14 AM
Last modification on : Sunday, April 24, 2022 - 4:16:01 PM

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  • HAL Id : hal-03606738, version 1
  • ARXIV : 2002.09187



Gang Bao, Yuantong Liu, Faouzi Triki. Recovering simultaneously a potential and a point source from Cauchy data. Minimax Theory and its Applications, Heldermann, 2021, 6 (2), pp.227--238. ⟨hal-03606738⟩



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