Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Statistical field theory for a multicomponent fluid: The collective
  variables approach   Using the collective variables (CV) method the basic relations of statistical
field theory of a multicomponent non-homogeneous fluids are reconsidered. The
corresponding CV action depends on two sets of scalar fields - fields
$\rho_{\alpha}$ connected to the local density fluctuations of the $\alpha$th
species of particles and fields $\omega_{\alpha}$ conjugated to
$\rho_{\alpha}$. The explicit expressions for the CV field correlations and
their relation to the density correlation functions are found. The perturbation
theory is formulated and a mean field level (MF) of the theory is considered in
detail.

18
The categories of this paper are: econ
37
The categories of this paper are: supr-con
25
The categories of this paper are: patt-sol
24
The categories of this paper are: dg-ga
3
The categories of this paper are: physics
27
The categories of this paper are: comp-gas
2
The categories of this paper are: math
36
The categories of this paper are: cmp-lg
30
The categories of this paper are: q-alg
20
The categories of this paper are: acc-phys
10
The categories of this paper are: q-bio
6
The categories of this paper are: astro-ph
28
The categories of this paper are: alg-geom
13
The categories of this paper are: quant-ph
29
The categories of this paper are: funct-an
35
The categories of this paper are: mtrl-th