Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Self-regular black holes quantized by means of an analogue to hydrogen
  atoms   We suggest a quantum black hole model that is based on an analogue to
hydrogen atoms. A self-regular Schwarzschild-AdS black hole is investigated,
where the mass density of the extreme black hole is given by the probability
density of the ground state of hydrogen atoms and the mass densities of
non-extreme black holes are given by the probability densities of excited
states with no angular momenta. Such an analogue is inclined to adopt
quantization of black hole horizons. In this way, the total mass of black holes
is quantized. Furthermore, the quantum hoop conjecture and the Correspondence
Principle are discussed.

6
The categories of this paper are: astro-ph
3
The categories of this paper are: physics
23
The categories of this paper are: solv-int
33
The categories of this paper are: plasm-ph
25
The categories of this paper are: patt-sol
32
The categories of this paper are: atom-ph
10
The categories of this paper are: q-bio
11
The categories of this paper are: hep-lat
21
The categories of this paper are: adap-org
24
The categories of this paper are: dg-ga
0
The categories of this paper are: hep-ph
31
The categories of this paper are: ao-sci
2
The categories of this paper are: math
17
The categories of this paper are: q-fin
16
The categories of this paper are: stat
19
The categories of this paper are: eess