Exotic atoms in two dimensions

Details Exotic atoms in two dimensions Exotic atoms in two dimensions

2010-06-29

arxiv.org/abs/1006.5506v2

Physics

Atomic Physics

Significant upgrade of the early version, with a new and more detailed derivation of the energy-shift formula, and all figures

Scientific paper

We study the behavior of energy levels in two dimensions for exotic atoms, i.e., when a long-range attractive potential is supplemented by a short-range interaction, and compare the results with these of the one- and three-dimensional cases. The energy shifts are well reproduced by a scattering length formula $ \delta{E}= A_0^2/\ln (a/R)$, where $a$ is the scattering length in the short-range potential, $A_0^2/(2\,\pi)$ the square of the wave function at the origin in the external potential, and $R$ is related to the derivative with respect to the energy of the solution that is regular at large distances.

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