Levinson's Theorem for the Klein-Gordon Equation in Two Dimensions

Details Levinson's Theorem for the Klein-Gordon Equation in Two Dimensions Levinson's Theorem for the Klein-Gordon Equation in Two Dimensions

1998-08-21

arxiv.org/abs/quant-ph/9808038v1

Physics

Quantum Physics

Revtex file 14 pages, submitted to Phys. Rev. A

Scientific paper

10.1103/PhysRevA.59.995

The two-dimensional Levinson theorem for the Klein-Gordon equation with a cylindrically symmetric potential $V(r)$ is established. It is shown that $N_{m}\pi=\pi (n_{m}^{+}-n_{m}^{-})= [\delta_{m}(M)+\beta_{1}]-[\delta_{m}(-M)+\beta_{2}]$, where $N_{m}$ denotes the difference between the number of bound states of the particle $n_{m}^{+}$ and the ones of antiparticle $n_{m}^{-}$ with a fixed angular momentum $m$, and the $\delta_{m}$ is named phase shifts. The constants $\beta_{1}$ and $\beta_{2}$ are introduced to symbol the critical cases where the half bound states occur at $E=\pm M$.

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