Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Topological edge states of nonequilibrium polaritons in hollow honeycomb
  arrays   We address topological currents in polariton condensates excited by uniform
resonant pumps in finite honeycomb arrays of microcavity pillars with a hole in
the center. Such currents arise under combined action of the spin-orbit
coupling and the Zeeman splitting that break the time-reversal symmetry and
open a topological gap in the spectrum of the structure. The most
representative feature of this structure is the presence of two interfaces,
inner and outer ones, where the directions of topological currents are
opposite. Due to the finite size of the structure polariton-polariton
interactions lead to the coupling of the edge states at the inner and outer
interfaces, which depends on the size of the hollow region. Moreover, switching
between currents can be realized by tuning the pump frequency. We illustrate
that currents in this finite structure can be stable and study bistability
effects arising due to the resonant character of the pump.

22
The categories of this paper are: chao-dyn
31
The categories of this paper are: ao-sci
0
The categories of this paper are: hep-ph
8
The categories of this paper are: hep-ex
9
The categories of this paper are: nlin
11
The categories of this paper are: hep-lat
16
The categories of this paper are: stat
35
The categories of this paper are: mtrl-th
24
The categories of this paper are: dg-ga
1
The categories of this paper are: cs
37
The categories of this paper are: supr-con
18
The categories of this paper are: econ
13
The categories of this paper are: quant-ph
28
The categories of this paper are: alg-geom
5
The categories of this paper are: gr-qc
30
The categories of this paper are: q-alg