Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Pondermotive potential and Backward Raman Scattering in dense quantum
  plasmas   The response of dense quantum plasmas in the backward Raman scattering is
studied. The coefficients in the backward Raman scattering is found to be
underestimated (overestimated) in the classical theory if the excited Langmuir
wave has low-wave vector (high-wave vector). The second order quantum
perturbation theory shows that the second harmonic of the pondermotive
potential arises naturally even in a single particle motion contrary to the
classical plasmas.

0
The categories of this paper are: hep-ph
31
The categories of this paper are: ao-sci
20
The categories of this paper are: acc-phys
34
The categories of this paper are: chem-ph
36
The categories of this paper are: cmp-lg
28
The categories of this paper are: alg-geom
22
The categories of this paper are: chao-dyn
10
The categories of this paper are: q-bio
33
The categories of this paper are: plasm-ph
19
The categories of this paper are: eess
11
The categories of this paper are: hep-lat
16
The categories of this paper are: stat
2
The categories of this paper are: math
6
The categories of this paper are: astro-ph
27
The categories of this paper are: comp-gas
25
The categories of this paper are: patt-sol