Inverse $N$-body scattering with the time-dependent hartree-fock approximation

Michiyuki Watanabe

doi:10.3934/ipi.2021002

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2021, Volume 15, Issue 3: 499-517. Doi: 10.3934/ipi.2021002

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Inverse $N$-body scattering with the time-dependent hartree-fock approximation

Michiyuki Watanabe

Department of Sciences, Okayama University of Science, 1-1 Ridaicho, Kita-ku, Okayama-shi 700-0005, Japan

Received: April 30, 2020

Revised: August 31, 2020

Early access: December 2020

Published: June 2021

The first author is supported by JSPS KAKENHI Grant Number 19K03617

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We consider an inverse $N$-body scattering problem of determining two potentials—an external potential acting on all particles and a pair interaction potential—from the scattering particles. This paper finds that the time-dependent Hartree-Fock approximation for a three-dimensional inverse $N$-body scattering in quantum mechanics enables us to recover the two potentials from the scattering states with high-velocity initial states. The main ingredient of mathematical analysis in this paper is based on the asymptotic analysis of the scattering operator defined in terms of a scattering solution to the Hartree-Fock equation at high energies. We show that the leading part of the asymptotic expansion of the scattering operator uniquely reconstructs the Fourier transform of the pair interaction, and the second term of the expansion uniquely reconstructs the $X$-ray transform of the external potential.

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Mathematics Subject Classification: Primary: 35R30, 35P25; Secondary: 81U40.

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