Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Collective states of active matter with stochastic reversals: emergent
  chiral states and spontaneous current switching   We study collective dynamical behavior of active particles with topological
interactions and directional reversals. Surprising phenomena are shown to
emerge as the interaction relaxation time is varied relative to the reversal
rate, such as spontaneous formation of collective chiral states due to phase
synchronization, and collective directional reversals in the presence of
confinement. The results have a direct relevance to modelling and understanding
collective reversals and synchronization phenomena in active matter.

30
The categories of this paper are: q-alg
5
The categories of this paper are: gr-qc
18
The categories of this paper are: econ
21
The categories of this paper are: adap-org
37
The categories of this paper are: supr-con
13
The categories of this paper are: quant-ph
14
The categories of this paper are: math-ph
32
The categories of this paper are: atom-ph
17
The categories of this paper are: q-fin
33
The categories of this paper are: plasm-ph
28
The categories of this paper are: alg-geom
0
The categories of this paper are: hep-ph
19
The categories of this paper are: eess
2
The categories of this paper are: math
20
The categories of this paper are: acc-phys
12
The categories of this paper are: nucl-th