Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Corrections to the RPA Dielectric Function Induced by Fluctuations in
  the Momentum Distribution   In this article, we introduce a new dielectric function that is different
even from the generalised RPA, first introduced in cond-mat/9810043, in that it
pays attention to fluctuations in the momentum distribution. We argued that
this is important when the momentum distribution is very nonideal. This new
dielectric function reduces to the generalised RPA when the number-fluctuations
are small, and the generalised RPA in turn reduces to the traditional RPA
dielectric function when the momentum distribution is close to ideal.

33
The categories of this paper are: plasm-ph
13
The categories of this paper are: quant-ph
2
The categories of this paper are: math
22
The categories of this paper are: chao-dyn
24
The categories of this paper are: dg-ga
31
The categories of this paper are: ao-sci
3
The categories of this paper are: physics
19
The categories of this paper are: eess
17
The categories of this paper are: q-fin
9
The categories of this paper are: nlin
28
The categories of this paper are: alg-geom
0
The categories of this paper are: hep-ph
10
The categories of this paper are: q-bio
30
The categories of this paper are: q-alg
32
The categories of this paper are: atom-ph
20
The categories of this paper are: acc-phys