Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Analytic computation of the energy levels of a two-dimensional
  hydrogenic donor in a constant magnetic field   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, we
calculate the energy eigenvalues 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 good behavior in the weak and strong magnetic field
regimes.

36
The categories of this paper are: cmp-lg
24
The categories of this paper are: dg-ga
8
The categories of this paper are: hep-ex
15
The categories of this paper are: nucl-ex
34
The categories of this paper are: chem-ph
31
The categories of this paper are: ao-sci
7
The categories of this paper are: hep-th
22
The categories of this paper are: chao-dyn
28
The categories of this paper are: alg-geom
27
The categories of this paper are: comp-gas
33
The categories of this paper are: plasm-ph
2
The categories of this paper are: math
26
The categories of this paper are: bayes-an
29
The categories of this paper are: funct-an
23
The categories of this paper are: solv-int
32
The categories of this paper are: atom-ph