Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Across-horizon scattering and information transfer   We address the question whether or not two electrically charged elementary
particles can Coulomb scatter if one of these particles is inside the
Schwarzschild black-hole horizon and the other outside. It can be shown that
the quantum process is consistent with the local energy-momentum conservation
law. This result implies that across-horizon scattering is a physical effect,
relevant to astrophysical black holes. We propose a Gedankenexperiment which
uses the quantum scattering process to transfer information from inside the
black-hole horizon to outside.

28
The categories of this paper are: alg-geom
1
The categories of this paper are: cs
26
The categories of this paper are: bayes-an
31
The categories of this paper are: ao-sci
2
The categories of this paper are: math
8
The categories of this paper are: hep-ex
4
The categories of this paper are: cond-mat
21
The categories of this paper are: adap-org
32
The categories of this paper are: atom-ph
10
The categories of this paper are: q-bio
22
The categories of this paper are: chao-dyn
30
The categories of this paper are: q-alg
16
The categories of this paper are: stat
12
The categories of this paper are: nucl-th
23
The categories of this paper are: solv-int
0
The categories of this paper are: hep-ph