Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A mesoscopic field theoretical approach for active systems   We introduce a mesocopic modeling approach for active systems. The continuum
model allows to consider microscopic details as well as emerging macroscopic
behavior and can be considered as a minimal continuum model to describe generic
properties of active systems with isotropic agents. The model combines aspects
from phase field crystal (PFC) models and Toner-Tu models. The results are
validated by reproducing results obtained with corresponding agent-based
microscopic models. We consider binary collisions, collective motion and vortex
formation. For larger numbers of particles we analyze the coarsening process in
active crystals and identify giant number fluctuation in the cluster formation
process.

16
The categories of this paper are: stat
10
The categories of this paper are: q-bio
28
The categories of this paper are: alg-geom
12
The categories of this paper are: nucl-th
2
The categories of this paper are: math
33
The categories of this paper are: plasm-ph
25
The categories of this paper are: patt-sol
0
The categories of this paper are: hep-ph
8
The categories of this paper are: hep-ex
34
The categories of this paper are: chem-ph
23
The categories of this paper are: solv-int
24
The categories of this paper are: dg-ga
3
The categories of this paper are: physics
13
The categories of this paper are: quant-ph
31
The categories of this paper are: ao-sci
32
The categories of this paper are: atom-ph