Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Critical fluctuations in models with van der Waals interactions   Particle number fluctuations are considered within the van der Waals (VDW)
equation, which contains both attractive (mean-field) and repulsive
(eigenvolume) interactions. The VDW equation is used to calculate the scaled
variance of particle number fluctuations in generic Boltzmann VDW system and in
nuclear matter. The strongly intensive measures $\Delta[E^*,N]$ and
$\Sigma[E^*,N]$ of the particle number and excitation energy fluctuations are
also considered, and, similarly, show singular behavior near the critical
point. The $\Delta[E^*,N]$ measure is shown to attain both positive and
negative values in the vicinity of critical point. Based on universality
argument, similar behavior is expected to occur in the vicinity of the QCD
critical point.

20
The categories of this paper are: acc-phys
2
The categories of this paper are: math
5
The categories of this paper are: gr-qc
32
The categories of this paper are: atom-ph
9
The categories of this paper are: nlin
8
The categories of this paper are: hep-ex
19
The categories of this paper are: eess
28
The categories of this paper are: alg-geom
10
The categories of this paper are: q-bio
36
The categories of this paper are: cmp-lg
21
The categories of this paper are: adap-org
17
The categories of this paper are: q-fin
26
The categories of this paper are: bayes-an
35
The categories of this paper are: mtrl-th
30
The categories of this paper are: q-alg
22
The categories of this paper are: chao-dyn