Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Dynamics of particles and cages in an experimental 2D glass former   We investigate the dynamics of a glass forming 2D colloidal mixture and show
the existence of collective motions of the particles. We introduce a mean
square displacement MSD with respect to the nearest neighbors which shows
remarkable deviations from the usual MSD quantifying the individual motion of
our particles. Combined with the analysis of the self part of the Van Hove
function this indicates a coupled motion of particles with their cage as well
as intra cage hopping processes.

2
The categories of this paper are: math
34
The categories of this paper are: chem-ph
16
The categories of this paper are: stat
29
The categories of this paper are: funct-an
32
The categories of this paper are: atom-ph
35
The categories of this paper are: mtrl-th
10
The categories of this paper are: q-bio
21
The categories of this paper are: adap-org
20
The categories of this paper are: acc-phys
1
The categories of this paper are: cs
30
The categories of this paper are: q-alg
33
The categories of this paper are: plasm-ph
24
The categories of this paper are: dg-ga
3
The categories of this paper are: physics
22
The categories of this paper are: chao-dyn
28
The categories of this paper are: alg-geom