Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Superradiance Transition in Graphene   We study theoretically and numerically the conditions required for the
appearance of a superradiance transition in graphene. The electron properties
of graphene are described in the single $p_z$-orbital tight-binding
approximation, in which the model is reduced to the effective two-level
pseudo-spin $1/2$ system. For each level we introduce the electron transfer
rate of escape into a continuum. We demonstrate that, under some conditions,
the superradiance experiences the maximal quantum coherent escape to the
continuum.

28
The categories of this paper are: alg-geom
9
The categories of this paper are: nlin
31
The categories of this paper are: ao-sci
12
The categories of this paper are: nucl-th
26
The categories of this paper are: bayes-an
30
The categories of this paper are: q-alg
19
The categories of this paper are: eess
27
The categories of this paper are: comp-gas
29
The categories of this paper are: funct-an
16
The categories of this paper are: stat
37
The categories of this paper are: supr-con
11
The categories of this paper are: hep-lat
20
The categories of this paper are: acc-phys
2
The categories of this paper are: math
18
The categories of this paper are: econ
24
The categories of this paper are: dg-ga