Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Adventures in de Sitter space   This is my contribution to the Festschrift honoring Stephen Hawking on his
60th birthday. Twenty-five years ago, Gibbons and Hawking laid out the
semi-classical properties of de Sitter space. After a summary of their main
results, I discuss some further quantum aspects that have since been
understood. The largest de Sitter black hole displays an intriguing pattern of
instabilities, which can render the boundary structure arbitrarily complicated.
I review entropy bounds specific to de Sitter space and outline a few of the
strategies and problems in the search for a full quantum theory of the
spacetime.

26
The categories of this paper are: bayes-an
32
The categories of this paper are: atom-ph
12
The categories of this paper are: nucl-th
14
The categories of this paper are: math-ph
19
The categories of this paper are: eess
17
The categories of this paper are: q-fin
6
The categories of this paper are: astro-ph
18
The categories of this paper are: econ
30
The categories of this paper are: q-alg
1
The categories of this paper are: cs
35
The categories of this paper are: mtrl-th
16
The categories of this paper are: stat
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The categories of this paper are: adap-org
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The categories of this paper are: chao-dyn
3
The categories of this paper are: physics
10
The categories of this paper are: q-bio