Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Nonlinear longitudinal current generated by N transversal
  electromagnetic waves in the quantum plasma   Quantum plasma with arbitrary degree of degeneration of electronic gas is
considered. In plasma N (N>2) external electromagnetic waves are propagated. It
is required to find the response of plasma to these waves. From kinetic Wigner
equation for quantum collisionless plasmas distribution function in square-law
approach on quantities of vector potentials of N electric fields is received.
The formula for electric current calculation is deduced at arbitrary
temperature, i.e. at arbitrary degree of degeneration of electronic gas. It is
shown, that the nonlinearity account leads to occurrence of the longitudinal
electric current directed along a wave vector. This longitudinal current is
orthogonal to the known transversal current received at the linear analysis.
The case of small values of wave number is considered. It is shown, that in
case of small values of wave numbers the longitudinal current in quantum plasma
coincides with a longitudinal current in classical plasma.

15
The categories of this paper are: nucl-ex
1
The categories of this paper are: cs
16
The categories of this paper are: stat
10
The categories of this paper are: q-bio
30
The categories of this paper are: q-alg
18
The categories of this paper are: econ
28
The categories of this paper are: alg-geom
35
The categories of this paper are: mtrl-th
31
The categories of this paper are: ao-sci
36
The categories of this paper are: cmp-lg
21
The categories of this paper are: adap-org
37
The categories of this paper are: supr-con
17
The categories of this paper are: q-fin
32
The categories of this paper are: atom-ph
29
The categories of this paper are: funct-an
5
The categories of this paper are: gr-qc