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Uniqueness and stability in an inverse problem for the Schrödinger equation

Lucie Baudouin and Jean-Pierre Puel

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We study the Schrödinger equation iy' + Δy + qy = 0 in Ω × (0, T) with Dirichlet boundary data y|∂Ω×(0,T) and initial condition y|Ω×{0} and we consider the inverse problem of determining the potential q(x), x in Ω when ∂y/∂ν|Γ0 ×(0,T) is given. Here Ω is an open-bounded domain of Bbb RN, Γ0 is an open subset of ∂Ω satisfying a suitable geometrical condition and T > 0. More precisely, from a global Carleman estimate we prove a stability inequality between |pq| and | ∂y(q)/∂ν − ∂y(p)/∂ν| with appropriate norms.


PACS

02.30.Zz Inverse problems

03.65.Ge Solutions of wave equations: bound states

02.30.Jr Partial differential equations

MSC

35Q55 NLS-like (nonlinear Schrödinger) equations (See also 37K10)

35B35 Stability, boundedness

35A05 General existence and uniqueness theorems

35R30 Inverse problems (undetermined coefficients, etc.) for PDE

Subjects

Mathematical physics

Quantum information and quantum mechanics

Dates

Issue 6 (December 2002)

Received 14 June 2002, in final form 26 June 2002

Published 18 October 2002



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