Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Scattering matrix approach to the description of quantum electron
  transport   We consider the scattering matrix approach to quantum electron transport in
meso- and nano-conductors. This approach is an alternative to the more
conventional kinetic equation and Green's function approaches, and often is
more efficient for coherent conductors (especially for proving general
relations) and typically more transparent. We provide a description of both
time-averaged quantities (for example, current-voltage characteristics) and
current fluctuations in time -- noise, as well as full counting statistics of
charge transport in a finite time. In addition to normal conductors, we
consider contacts with superconductors and Josephson junctions.

1
The categories of this paper are: cs
10
The categories of this paper are: q-bio
25
The categories of this paper are: patt-sol
12
The categories of this paper are: nucl-th
2
The categories of this paper are: math
33
The categories of this paper are: plasm-ph
29
The categories of this paper are: funct-an
37
The categories of this paper are: supr-con
17
The categories of this paper are: q-fin
3
The categories of this paper are: physics
19
The categories of this paper are: eess
22
The categories of this paper are: chao-dyn
6
The categories of this paper are: astro-ph
8
The categories of this paper are: hep-ex
15
The categories of this paper are: nucl-ex
34
The categories of this paper are: chem-ph