Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Radiation from Atoms Falling into a Black Hole   We show that atoms falling from outside through a cavity into a black hole
(BH) emit acceleration radiation which to a distant observer looks much like
Hawking BH radiation. In particular, we find the entropy of the acceleration
radiation via a simple laser-like analysis. We call this entropy Horizon
Brightened Acceleration Radiation (HBAR) entropy to distinguish it from the BH
entropy of Bekenstein and Hawking.

26
The categories of this paper are: bayes-an
30
The categories of this paper are: q-alg
4
The categories of this paper are: cond-mat
1
The categories of this paper are: cs
36
The categories of this paper are: cmp-lg
6
The categories of this paper are: astro-ph
31
The categories of this paper are: ao-sci
16
The categories of this paper are: stat
27
The categories of this paper are: comp-gas
14
The categories of this paper are: math-ph
33
The categories of this paper are: plasm-ph
34
The categories of this paper are: chem-ph
22
The categories of this paper are: chao-dyn
21
The categories of this paper are: adap-org
25
The categories of this paper are: patt-sol
10
The categories of this paper are: q-bio