Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Entropy from near-horizon geometries of Killing horizons   We derive black hole entropy based on the near-horizon symmetries of black
hole space-times. To derive these symmetries we make use of an $(R,T)$-plane
close to a Killing horizon. We identify a set of vector fields that preserves
this plane and forms a Witt algebra. The corresponding algebra of Hamiltonians
is shown to have a non-trivial central extension. Using the Cardy formula and
the central charge we obtain the Bekenstein-Hawking entropy.

13
The categories of this paper are: quant-ph
15
The categories of this paper are: nucl-ex
36
The categories of this paper are: cmp-lg
9
The categories of this paper are: nlin
28
The categories of this paper are: alg-geom
25
The categories of this paper are: patt-sol
37
The categories of this paper are: supr-con
17
The categories of this paper are: q-fin
19
The categories of this paper are: eess
33
The categories of this paper are: plasm-ph
14
The categories of this paper are: math-ph
6
The categories of this paper are: astro-ph
20
The categories of this paper are: acc-phys
22
The categories of this paper are: chao-dyn
4
The categories of this paper are: cond-mat
0
The categories of this paper are: hep-ph