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math.SP2013
A weak Gordon type condition for absence of eigenvalues of one-dimensional Schrödinger operators
Christian Seifert, Hendrik Vogt
We study one-dimensional Schrödinger operators with complex measures as potentials and present an improved criterion for absence of eigenvalues which involves a weak local periodic…
math.SP2013★ 7 cited
Absence of absolutely continuous spectrum for the Kirchhoff Laplacian on radial trees
Pavel Exner, Christian Seifert, Peter Stollmann
In this paper we prove that the existence of absolutely continuous spectrum of the Kirchhoff Laplacian on a radial metric tree graph together with a finite complexity of the geomet…