Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Theory of ac Josephson effect and noise in superconducting constrictions   The manuscript presents an overview of recent developments in theory of
multiple Andreev reflections in Josephson junctions with arbitrary transparency
and arbitrary quasiparticle dispersion in the electrodes.

30
The categories of this paper are: q-alg
33
The categories of this paper are: plasm-ph
31
The categories of this paper are: ao-sci
1
The categories of this paper are: cs
11
The categories of this paper are: hep-lat
26
The categories of this paper are: bayes-an
16
The categories of this paper are: stat
22
The categories of this paper are: chao-dyn
29
The categories of this paper are: funct-an
37
The categories of this paper are: supr-con
6
The categories of this paper are: astro-ph
32
The categories of this paper are: atom-ph
20
The categories of this paper are: acc-phys
2
The categories of this paper are: math
36
The categories of this paper are: cmp-lg
3
The categories of this paper are: physics