Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Dynamic ordering transitions in charged solid   The phenomenon of group motion is common in nature, ranging from the schools
of fish, birds and insects, to avalanches, landslides and sand drift. If we
treat objects as collectively moving particles, such phenomena can be studied
from a physical point of view, and the research on many-body systems has proved
that marvelous effects can arise from the simplest individuals. The motion of
numerous individuals presents different dynamic phases related to the ordering
of the system. However, it is usually difficult to study the dynamic ordering
and their transitions through experiments. Electron bubble states formed in a
two-dimensional electron gas, as a type of electron solids, can be driven by an
external electric field and provide a platform to study the dynamic collective
behaviors. Here, we demonstrate that noise spectrum is a powerful method to
investigate the dynamics of bubble states. We observed not only the phenomena
from dynamically ordered and disordered structures, but also unexpected
alternations between them. Our results show that a dissipative system can
convert between chaotic structures and ordered structures when tuning global
parameters, which is concealed in conventional transport measurements of
resistance or conductance. Moreover, charging the objects to study electrical
noise spectrum in collective motions can be an additional approach to revealing
dynamic ordering transitions.

5
The categories of this paper are: gr-qc
2
The categories of this paper are: math
34
The categories of this paper are: chem-ph
1
The categories of this paper are: cs
6
The categories of this paper are: astro-ph
31
The categories of this paper are: ao-sci
12
The categories of this paper are: nucl-th
35
The categories of this paper are: mtrl-th
32
The categories of this paper are: atom-ph
37
The categories of this paper are: supr-con
11
The categories of this paper are: hep-lat
18
The categories of this paper are: econ
3
The categories of this paper are: physics
17
The categories of this paper are: q-fin
28
The categories of this paper are: alg-geom
27
The categories of this paper are: comp-gas