Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Toroidal configuration of the orbit of the electron of the hydrogen atom
  under strong external magnetic fields   In this paper we overview some results on the hydrogen atom in external
static uniform magnetic fields. We focus on the case of very strong magnetic
field, B>>B_0=2.3x10^9 Gauss, use various approximate models and, particularly,
in the adiabatic approximation have calculated exactly the integral defining
the effective potential. This potential appears to be finite at z=0. Our
consideration of the problem of highly magnetized atoms and molecules is
motivated by the recently developed MagneGas technology by Santilli
(http://www.magnegas.com). The ground state electron charge distribution of the
hydrogen atom in an intense magnetic field is of a toroidal form, in agreement
with that studied by Santilli. This physical picture is at the foundation of
the new chemical species of magnecules proposed by Santilli.

5
The categories of this paper are: gr-qc
14
The categories of this paper are: math-ph
32
The categories of this paper are: atom-ph
18
The categories of this paper are: econ
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The categories of this paper are: astro-ph
25
The categories of this paper are: patt-sol
0
The categories of this paper are: hep-ph
24
The categories of this paper are: dg-ga
29
The categories of this paper are: funct-an
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The categories of this paper are: hep-th
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The categories of this paper are: math
8
The categories of this paper are: hep-ex
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The categories of this paper are: hep-lat
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The categories of this paper are: cmp-lg
1
The categories of this paper are: cs
23
The categories of this paper are: solv-int