Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Application of a quantum wave impedance method for zero-range singular
  potentials   An application of a quantum wave impedance method for a study of
quantum-mechanical systems which con\-tain singular zero-range potentials is
considered. It was shown how to reformulate the problem of an investigation of
mentioned systems in terms of a quantum wave impedance. As a result both the
scattering and bound states problems are solved for systems of single $\delta$,
double $\delta$ and single $\delta-\delta'$ potentials. The formalization of
solving systems with an arbitrary combination of a piesewise constant potential
and a $\delta$-potentials with the help of a quantum wave impedance approach is
described.

1
The categories of this paper are: cs
34
The categories of this paper are: chem-ph
16
The categories of this paper are: stat
24
The categories of this paper are: dg-ga
18
The categories of this paper are: econ
25
The categories of this paper are: patt-sol
0
The categories of this paper are: hep-ph
10
The categories of this paper are: q-bio
27
The categories of this paper are: comp-gas
19
The categories of this paper are: eess
7
The categories of this paper are: hep-th
28
The categories of this paper are: alg-geom
8
The categories of this paper are: hep-ex
20
The categories of this paper are: acc-phys
30
The categories of this paper are: q-alg
33
The categories of this paper are: plasm-ph