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Inverse scattering for Schrödinger operators with Miura potentials: I. Unique Riccati representatives and ZS-AKNS systems

C Frayer1, R O Hryniv2,3,4, Ya V Mykytyuk4 and P A Perry5

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This is the first in a series of papers on scattering theory for one-dimensional Schrödinger operators with highly singular potentials q\in H_{\mathrm{loc}}^{-1}(\mathbb {R}). In this paper, we study Miura potentials q associated with positive Schrödinger operators that admit a Riccati representation q = u' + u2 for a unique u\in L^{1}(\mathbb {R})\cap L^{2}(\mathbb {R}). Such potentials have a well-defined reflection coefficient r(k) that satisfies |r(k)| < 1 and determines u uniquely. We show that the scattering map \mathcal {S}\,:\, u\mapsto r is real analytic with real-analytic inverse. To do so, we exploit a natural complexification of the scattering map associated with the ZS-AKNS system. In subsequent papers, we will consider larger classes of potentials including singular potentials with bound states.


PACS

03.65.Ge Solutions of wave equations: bound states

02.30.Jr Partial differential equations

02.30.Zz Inverse problems

02.30.Tb Operator theory

MSC

81U40 Inverse scattering problems

35J10 Schrödinger operator (See also 35Pxx)

Subjects

Mathematical physics

Quantum information and quantum mechanics

Dates

Issue 11 (November 2009)

Received 13 July 2009, in final form 4 September 2009

Published 29 October 2009



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