Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Modulated phases of graphene quantum Hall polariton fluids   There is growing experimental interest in coupling cavity photons to the
cyclotron resonance excitations of electron liquids in high-mobility
semiconductor quantum wells or graphene sheets. These media offer unique
platforms to carry out fundamental studies of exciton-polariton condensation
and cavity quantum electrodynamics in a regime in which electron-electron
interactions are expected to play a pivotal role. Focusing on graphene, we
present a theoretical study of the impact of electron-electron interactions on
a quantum Hall polariton fluid, that is a fluid of magneto-excitons resonantly
coupled to cavity photons. We show that electron-electron interactions are
responsible for an instability of graphene integer quantum Hall polariton
fluids towards a modulated phase. We demonstrate that this phase can be
detected by measuring the collective excitation spectra, which soften at a
characteristic wave vector of the order of the inverse magnetic length.

10
The categories of this paper are: q-bio
21
The categories of this paper are: adap-org
7
The categories of this paper are: hep-th
33
The categories of this paper are: plasm-ph
16
The categories of this paper are: stat
22
The categories of this paper are: chao-dyn
2
The categories of this paper are: math
6
The categories of this paper are: astro-ph
28
The categories of this paper are: alg-geom
23
The categories of this paper are: solv-int
35
The categories of this paper are: mtrl-th
36
The categories of this paper are: cmp-lg
19
The categories of this paper are: eess
34
The categories of this paper are: chem-ph
25
The categories of this paper are: patt-sol
15
The categories of this paper are: nucl-ex