Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Hawking Radiation: A Comparison of Pure-state and Thermal Descriptions   The cases of the Hawking radiation field being described by a pure state and
by the usual thermal state are compared within the CGHS dilaton gravity model.
The field-strength fluctuations of the Fourier modes are computed, showing a
discrepancy in the low-energy regime, while coinciding at high energies. Then
by defining a distance for density operators and evaluating it for the cases
concerned, the difference between the pure and thermal descriptions is
quantified and found to be exponentially small with respect to the Hawking
temperature. Possible physical interpretations are discussed.

11
The categories of this paper are: hep-lat
13
The categories of this paper are: quant-ph
0
The categories of this paper are: hep-ph
26
The categories of this paper are: bayes-an
18
The categories of this paper are: econ
36
The categories of this paper are: cmp-lg
10
The categories of this paper are: q-bio
1
The categories of this paper are: cs
7
The categories of this paper are: hep-th
37
The categories of this paper are: supr-con
12
The categories of this paper are: nucl-th
28
The categories of this paper are: alg-geom
21
The categories of this paper are: adap-org
22
The categories of this paper are: chao-dyn
16
The categories of this paper are: stat
8
The categories of this paper are: hep-ex