Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: On the interior of (Quantum) Black Holes   Different approaches to quantum gravity conclude that black holes may possess
an inner horizon, in addition to the (quantum corrected) outer `Schwarzschild'
horizon. In this paper we assume the existence of this inner horizon and
explain the physical process that might lead to the tunneling of particles
through it. It is shown that the tunneling would produce a flux of particles
with a spectrum that deviates from the pure thermal one. Under the appropriate
approximation the extremely high temperature of this horizon is calculated for
an improved quantum black hole. It is argued that the flux of particles
tunneled through the horizons affects the dynamics of the black hole interior
leading to an endogenous instability.

37
The categories of this paper are: supr-con
30
The categories of this paper are: q-alg
25
The categories of this paper are: patt-sol
28
The categories of this paper are: alg-geom
1
The categories of this paper are: cs
35
The categories of this paper are: mtrl-th
8
The categories of this paper are: hep-ex
24
The categories of this paper are: dg-ga
21
The categories of this paper are: adap-org
32
The categories of this paper are: atom-ph
17
The categories of this paper are: q-fin
10
The categories of this paper are: q-bio
11
The categories of this paper are: hep-lat
2
The categories of this paper are: math
22
The categories of this paper are: chao-dyn
26
The categories of this paper are: bayes-an