paper

Levinson theorem in two dimensions

arXiv:quant-ph/9806073 · doi:10.1103/PhysRevA.56.1938

Abstract

A two-dimensional analogue of Levinson's theorem for nonrelativistic quantum mechanics is established, which relates the phase shift at threshold(zero momentum) for the th partial wave to the total number of bound states with angular momentum in an attractive central field.

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