Inverse problems for locally perturbed lattices -- Discrete Hamiltonian and quantum graph

Emilia Blåsten, Pavel Exner, Hiroshi Isozaki, Matti Lassas, Jinpeng Lu

Published 2022-02-02Version 1

We consider the inverse scattering problems for two types of Schr\"odinger operators on locally perturbed periodic lattices. For the discrete Hamiltonian, the knowledge of the S-matrix for all energies determines the graph structure and the coefficients of the Hamiltonian. For locally perturbed equilateral metric graphs, the knowledge of the S-matrix for all energies determines the graph structure.