Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Effect of magnetic fields on bound localized electron states   An approximate analytic solution for the ground electron state are found to
the Schroedinger equation for a combination of a uniform magnetic field and
single attractive delta-potential. Effect of the magnetic field on this bound
localized electron state is discussed. We show that above effect leads to
appearing the probability current density in some region centered in the point
of the delta-potential as well as to enlarging (for a number of physical
models) the localization region of the electron in the plane perpendicular to
the magnetic field. We are expected that these properties can be of importance
for real quantum mechanical systems.

37
The categories of this paper are: supr-con
6
The categories of this paper are: astro-ph
21
The categories of this paper are: adap-org
16
The categories of this paper are: stat
34
The categories of this paper are: chem-ph
33
The categories of this paper are: plasm-ph
32
The categories of this paper are: atom-ph
0
The categories of this paper are: hep-ph
30
The categories of this paper are: q-alg
18
The categories of this paper are: econ
3
The categories of this paper are: physics
25
The categories of this paper are: patt-sol
10
The categories of this paper are: q-bio
29
The categories of this paper are: funct-an
8
The categories of this paper are: hep-ex
4
The categories of this paper are: cond-mat