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Anomalous electron trapping by magnetic flux tubes and electric current vortices

F. Bentosela·P. Exner·V. A. Zagrebnov
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Abstract

We consider an electron with an anomalous magnetic moment, g>2, confined to a plane and interacting with a nonhomogeneous magnetic field B, and investigate the corresponding Pauli Hamiltonian. We prove a lower bound on the number of bound states for the case when B is of a compact support and the related flux is $N+ε, ε\in(0,1]$. In particular, there are at least N+1 bound states if B does not change sign. We also consider the situation where the magnetic field is due to a localized rotationally symmetric electric current vortex in the plane. In this case the flux is zero; there is a pair of bound states for a weak coupling, and higher orbital-momentum "spin-down" states appearing as the current strength increases.

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F. Bentosela, P. Exner, V. A. Zagrebnov. 1998-11-26. Anomalous electron trapping by magnetic flux tubes and electric current vortices. https://arxiv.org/abs/math-ph/9810016

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