Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Superradiance, charge density waves and lattice gauge theory in a
  generalized Rabi-Hubbard chain   We investigate a one-dimensional Rabi-Hubbard type of model, arranged such
that a qdot is sandwiched between every cavity. The role of the qdot is to
transmit photons between neighboring cavities, while simultaneously acting as a
photon non-linearity. We consider three-level qdots in the $\Lambda$
configuration, where the left and right leg couples exclusively to the left or
right cavity. This non-commuting interaction leads to two highly entangled
incompressible phases, separated by a second order quantum phase transition:
the qdot degrees-of-freedom act as a dynamical lattice for the photons and a
Peierls instability breaks a second $\mathbb{Z}_2$ symmetry which leads to a
dimerization in entanglement and photon number. We also find a normal
insulating phase and a superfluid phase that acts as a quantum many-body
superradiant phase. In the superradiant phase, a $\mathbb{Z}_2$ symmetry is
broken and the phase transition falls within the transverse field Ising model
universality class. Finally, we show that a limit of the model can be
interpreted as a $\mathbb{Z}_2$ lattice gauge theory.

32
The categories of this paper are: atom-ph
12
The categories of this paper are: nucl-th
36
The categories of this paper are: cmp-lg
1
The categories of this paper are: cs
21
The categories of this paper are: adap-org
35
The categories of this paper are: mtrl-th
5
The categories of this paper are: gr-qc
0
The categories of this paper are: hep-ph
29
The categories of this paper are: funct-an
25
The categories of this paper are: patt-sol
22
The categories of this paper are: chao-dyn
15
The categories of this paper are: nucl-ex
17
The categories of this paper are: q-fin
34
The categories of this paper are: chem-ph
19
The categories of this paper are: eess
18
The categories of this paper are: econ