Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Solution of the Dirac equation by separation of variables in spherical
  coordinates for a class of three-parameter non-central electromagnetic
  potential   We consider the three-dimensional Dirac equation in spherical coordinates
with coupling to static electromagnetic potential. The space components of the
potential have angular (non-central) dependence such that the Dirac equation is
separable in all coordinates. We obtain exact solutions for the case where the
potential satisfies the Lorentz gauge fixing condition and its time component
is the Coulomb potential. The relativistic energy spectrum and corresponding
spinor wavefunctions are obtained. The Aharonov-Bohm and magnetic monopole
potentials are included in these solutions.

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The categories of this paper are: alg-geom
15
The categories of this paper are: nucl-ex
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The categories of this paper are: atom-ph
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The categories of this paper are: solv-int
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The categories of this paper are: supr-con
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The categories of this paper are: comp-gas
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The categories of this paper are: ao-sci
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The categories of this paper are: dg-ga
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The categories of this paper are: adap-org
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The categories of this paper are: q-bio
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The categories of this paper are: nlin
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The categories of this paper are: q-fin
3
The categories of this paper are: physics
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The categories of this paper are: hep-ex
2
The categories of this paper are: math
16
The categories of this paper are: stat