Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Quasiseparation of variables in the Schroedinger equation with a
  magnetic field   We consider a two-dimensional integrable Hamiltonian system with a vector and
scalar potential in quantum mechanics. Contrary to the case of a pure scalar
potential, the existence of a second order integral of motion does not
guarantee the separation of variables in the Schroedinger equation. We
introduce the concept of "quasiseparation of variables" and show that in many
cases it allows us to reduce the calculation of the energy spectrum and wave
functions to linear algebra.

15
The categories of this paper are: nucl-ex
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The categories of this paper are: econ
27
The categories of this paper are: comp-gas
10
The categories of this paper are: q-bio
16
The categories of this paper are: stat
35
The categories of this paper are: mtrl-th
32
The categories of this paper are: atom-ph
8
The categories of this paper are: hep-ex
11
The categories of this paper are: hep-lat
34
The categories of this paper are: chem-ph
0
The categories of this paper are: hep-ph
1
The categories of this paper are: cs
6
The categories of this paper are: astro-ph
13
The categories of this paper are: quant-ph
37
The categories of this paper are: supr-con
24
The categories of this paper are: dg-ga