Two-Dimensional Periodic Schrödinger Operators Integrable at an Energy Eigenlevel

The main goal of the first part of the paper is to show that the Fermi curve of a two-dimensional periodic Schrödinger operator with nonnegative potential whose points parameterize the Bloch solutions of the Schrödinger equation at the zero energy level is a smooth M -curve. Moreover, it is shown th...

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Veröffentlicht in:	Functional analysis and its applications 2019, Vol.53 (1), p.23-36
Hauptverfasser:	Ilina, A. V., Krichever, I. M., Nekrasov, N. A.
Format:	Artikel
Sprache:	eng
Schlagworte:	Analysis Deformation Energy levels Functional Analysis Mathematics Mathematics and Statistics Operators (mathematics) Periodic functions Schrodinger equation
Online-Zugang:	Volltext
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