Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Optical solitons in periodically managed PT-symmetric media   The dynamics of light beams in the nonlinear optical media with periodically
modulated in the longitudinal direction parity-time distribution of the complex
refractive index is investigated. The possibility of dynamical stabilization of
PT-symmetric solitons is demonstrated.

0
The categories of this paper are: hep-ph
32
The categories of this paper are: atom-ph
13
The categories of this paper are: quant-ph
30
The categories of this paper are: q-alg
17
The categories of this paper are: q-fin
10
The categories of this paper are: q-bio
21
The categories of this paper are: adap-org
4
The categories of this paper are: cond-mat
15
The categories of this paper are: nucl-ex
20
The categories of this paper are: acc-phys
25
The categories of this paper are: patt-sol
2
The categories of this paper are: math
6
The categories of this paper are: astro-ph
34
The categories of this paper are: chem-ph
1
The categories of this paper are: cs
31
The categories of this paper are: ao-sci