Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Scaled variational computation of the energy spectrum of a
  two-dimensional hydrogenic donor in a magnetic field of arbitrary strength   We compute the energy levels of a 2D Hydrogen atom when a constant magnetic
field is applied. With the help of a mixed-basis variational method and a
genera lization of virial theorem, which consists in scaling the wave function,
we calculate the binding energies of the 1S, $2P^-$ and $3D^-$ levels. We
compare the computed energy spectra with those obtained via a generalization of
the mesh point technique as well as the shifted 1/N method. We show that the
variational solutions present a very good behavior in the weak and strong
magnetic field regimes.

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The categories of this paper are: dg-ga
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The categories of this paper are: q-alg
8
The categories of this paper are: hep-ex
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The categories of this paper are: bayes-an
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The categories of this paper are: math-ph
29
The categories of this paper are: funct-an
11
The categories of this paper are: hep-lat
9
The categories of this paper are: nlin
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The categories of this paper are: eess
0
The categories of this paper are: hep-ph
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The categories of this paper are: chao-dyn
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The categories of this paper are: cs
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The categories of this paper are: q-bio
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The categories of this paper are: nucl-th
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The categories of this paper are: plasm-ph
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The categories of this paper are: atom-ph