Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Comment on "The black hole final state"   Horowitz and Maldacena have suggested that the unitarity of the black hole
S-matrix can be reconciled with Hawking's semiclassical arguments if a
final-state boundary condition is imposed at the spacelike singularity inside
the black hole. We point out that, in this scenario, departures from unitarity
can arise due to interactions between the collapsing body and the infalling
Hawking radiation inside the event horizon. The amount of information lost when
a black hole evaporates depends on the extent to which these interactions are
entangling.

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The categories of this paper are: hep-ph
6
The categories of this paper are: astro-ph
33
The categories of this paper are: plasm-ph
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The categories of this paper are: dg-ga
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The categories of this paper are: math-ph
29
The categories of this paper are: funct-an
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The categories of this paper are: cond-mat
30
The categories of this paper are: q-alg
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The categories of this paper are: physics
37
The categories of this paper are: supr-con
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The categories of this paper are: nlin
25
The categories of this paper are: patt-sol
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The categories of this paper are: hep-lat
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The categories of this paper are: hep-ex
23
The categories of this paper are: solv-int
34
The categories of this paper are: chem-ph