Inverse Scattering Problem for the Schrodinger Equation in Three Dimensions: Connections Between Exact and Approximate Methods (original) (raw)

Solution of the Inverse Scattering Problem for the Three-Dimensional Schrödinger Equation Using a Fredholm Integral Equation

SIAM Journal on Mathematical Analysis, 1991

It is shown that the inverse scattering problem for the three-dimensional SchrSdinger equation with a potential having no spherical symmetry can be solved using a Fredholm integral equation. The integral operator studied here is shown to be compact and self-adjoint with its spectrum in [-1, 1]. The relationship between solutions of this Fredholm equation and of a related Riemann-Hilbert problem is also clarified, and it is shown that the Fredholm integral equation is uniquely solvable if and only if the Riemann-Hilbert problem is uniquely solvable.

The Schrödinger equation and a multidimensional inverse scattering transform

Mathematical Methods in The Applied Sciences, 2002

The Schr odinger equation is one of the most important equations in mathematics, physics and also engineering. We outline some connections between transformations of non-linear equations, the Schr odinger equation and the inverse scattering transform. After some remarks on generalizations into higher dimensions we present a multidimensional @ method based on Cli ord analysis. To explain the method we consider the formal solution of the inverse scattering problem for the n-dimensional time-dependent Schr odinger equations given by A.I. Nachman and M.J. Ablowitz.

Scattering and inverse scattering for the 1‐D Schrödinger equation with energy‐dependent potentials

Journal of Mathematical Physics, 1991

The one-dimensional Schriidinger equation with a potential k2 V(X) proportional to energy is studied. This equation is equivalent to the wave equation with variable speed. When V(X) < 1, is bounded below, and satisfies two integrability conditions, the scattering matrix is obtained and its asymptotics for small and large energies are established. The inverse scattering problem of recovering V(X) when the scattering matrix is known is also solved. By proving that all the solutions of a key Riemann-Hilbert problem have the same asymptotics for large energy, it is shown that the potential obtained is unique.

Inverse scattering on the line for a generalized nonlinear Schrödinger equation

Inverse Problems, 2004

A one-dimensional generalized nonlinear Schrödinger equation is considered, and the corresponding inverse scattering problem is analyzed when the potential is compactly supported and depends on the wave function. The unique recovery of the potential is established from an appropriate set of scattering data.

The Inverse Scattering Problem for the Matrix Schr\"odinger Equation

arXiv: Mathematical Physics, 2017

The matrix Schrodinger equation is considered on the half line with the general selfadjoint boundary condition at the origin described by two boundary matrices satisfying certain appropriate conditions. It is assumed that the matrix potential is integrable, is selfadjoint, and has a finite first moment. The corresponding scattering data set is constructed, and such scattering data sets are characterized by providing a set of necessary and sufficient conditions assuring the existence and uniqueness of the correspondence between the scattering data set and the input data set containing the potential and boundary matrices. The work presented here provides a generalization of the classical result by Agranovich and Marchenko from the Dirichlet boundary condition to the general selfadjoint boundary condition. The theory presented is illustrated with various explicit examples.

On the inverse problem in quantum scattering theory

International Journal of Quantum Chemistry, 2009

The Gel'fand-Levitan formulation of the inverse problem in quantum scattering theory is discussed with respect to completeness and analytic extensions. The classic Green's function and the associated completeness relation are analyzed within the Titchmarsh-Wcyl framework. An attractive feature of the Titchmarsh-Weyl formulation concerns the possibility to invoke complex scaling to a rather general set of potentials in order to expose resonance structures in the complex plane. In addition this procedure allow for an analytic extension of the classic Green's function and the associated completeness relation. The generalized completeness relation can be used to construct the kernels of the Gel'fand-Levitan integral equation. In addition to supplying a possibility for testing completeness properties of generalized expansions one may also find inversion formulas for potentials that exhibit analytic extensions to some sector in the complex plane. As a test we have analyzed a simple exponential potential which was found to contain a whole string of complex energy resonances with the resulting generalized spectral density being subjected to a particular deflation property.

The Schr�dinger equation and a multidimensional inverse scattering transform

Mathematical Methods in the Applied Sciences, 2002

The Schr odinger equation is one of the most important equations in mathematics, physics and also engineering. We outline some connections between transformations of non-linear equations, the Schr odinger equation and the inverse scattering transform. After some remarks on generalizations into higher dimensions we present a multidimensional @ method based on Cli ord analysis. To explain the method we consider the formal solution of the inverse scattering problem for the n-dimensional time-dependent Schr odinger equations given by A.I. Nachman and M.J. Ablowitz.

A transmutation operator method for solving the inverse quantum scattering problem *

Inverse Problems, 2020

The inverse quantum scattering problem for the perturbed Bessel equation is considered. A direct and practical method for solving the problem is proposed. It allows one to reduce the inverse problem to a system of linear algebraic equations, and the potential is recovered from the first component of the solution vector of the system. The approach is based on a special form Fourier–Jacobi series representation for the transmutation operator kernel and the Gelfand–Levitan equation which serves for obtaining the system of linear algebraic equations. The convergence and stability of the method are proved as well as the existence and uniqueness of the solution of the truncated system. Numerical realization of the method is discussed. Results of numerical tests are provided revealing a remarkable accuracy and stability of the method.

Multidimensional Inverse Quantum Scattering Problem and Wiener-Hopf Factorization

Springer eBooks, 1990

\Ve consider the direct and inverse scattering for the n-dimensional Schrodinger equation, n 2: 2, with a potential having no spherical symmetry. Sufficient conditions are given for the existence of a Wiener-Hopf factorization of the corresponding scattering operator. This factorization leads to the solution of a related Riemann-Hilbert problem, which plays a key role in inverse scattering.