Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Entanglement in a model for Hawking radiation: An Application of
  Quadratic Algebras   Quadratic polynomially deformed $su(1,1)$ and $su(2)$ algebras are utilised
in model Hamiltonians to show how the gravitational system consisting of a
black hole, infalling radiation and outgoing (Hawking) radiation can be solved
exactly. The models allow us to study the long-time behaviour of the black hole
and its outgoing modes. In particular, we calculate the bipartite entanglement
entropies of subsystems consisting of a) infalling plus outgoing modes and b)
black hole modes plus the infalling modes,using the Janus-faced nature of the
model.The long-time behaviour also gives us glimpses of modifications in the
character of Hawking radiation. Lastly, we study the phenomenon of
superradiance in our model in analogy with atomic Dicke superradiance.

6
The categories of this paper are: astro-ph
22
The categories of this paper are: chao-dyn
26
The categories of this paper are: bayes-an
0
The categories of this paper are: hep-ph
16
The categories of this paper are: stat
28
The categories of this paper are: alg-geom
30
The categories of this paper are: q-alg
20
The categories of this paper are: acc-phys
33
The categories of this paper are: plasm-ph
21
The categories of this paper are: adap-org
9
The categories of this paper are: nlin
23
The categories of this paper are: solv-int
37
The categories of this paper are: supr-con
3
The categories of this paper are: physics
4
The categories of this paper are: cond-mat
24
The categories of this paper are: dg-ga