Levinson's Theorem for Non-local Interactions in Two Dimensions
Shi-Hai dong, Xi-Wen Hou, Zhong-Qi Ma
Abstract
In the light of the Sturm-Liouville theorem, the Levinson theorem for the Schrödinger equation with both local and non-local cylindrically symmetric potentials is studied. It is proved that the two-dimensional Levinson theorem holds for the case with both local and non-local cylindrically symmetric cutoff potentials, which is not necessarily separable. In addition, the problems related to the positive-energy bound states and the physically redundant state are also discussed in this paper.
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