Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Coupled pair of one and two dimensional magneto-plasmons on electrons on
  helium   Electrons on the liquid helium surface form an extremely clean two
dimensional system where different plasmon-excitations can coexist. Under a
magnetic field time reversal symmetry is broken and all the bulk
magneto-plasmons become gaped at frequencies below cyclotron resonance while
chiral one dimensional edge magneto-plasmons appear at the system perimeter. We
theoretically show that the presence of a homogeneous density gradient in the
electron gas leads to the formation of a delocalized magneto-plasmon mode in
the same frequency range as the lowest frequency edge-magnetoplasmon mode. We
experimentally confirm its existence by measuring the corresponding resonance
peak in frequency dependence of the admittance of the electron gas. This allows
to realize a prototype system to investigate the coupling between a chiral
one-dimensional mode and a single delocalized bulk mode. Such a model system
can be important for the understanding of transport properties of topological
materials where states of different dimensionality can coexist.

11
The categories of this paper are: hep-lat
6
The categories of this paper are: astro-ph
21
The categories of this paper are: adap-org
14
The categories of this paper are: math-ph
15
The categories of this paper are: nucl-ex
19
The categories of this paper are: eess
2
The categories of this paper are: math
5
The categories of this paper are: gr-qc
33
The categories of this paper are: plasm-ph
30
The categories of this paper are: q-alg
35
The categories of this paper are: mtrl-th
18
The categories of this paper are: econ
13
The categories of this paper are: quant-ph
3
The categories of this paper are: physics
26
The categories of this paper are: bayes-an
25
The categories of this paper are: patt-sol