Causal boundary entropy from horizon conformal field theory

Authors
Citation
R. Brustein, Causal boundary entropy from horizon conformal field theory, PHYS REV L, 86(4), 2001, pp. 576-579
Citations number
18
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Physics
Journal title
PHYSICAL REVIEW LETTERS
ISSN journal
0031-9007 → ACNP
Volume
86
Issue
4
Year of publication
2001
Pages
576 - 579
Database
ISI
SICI code
0031-9007(20010122)86:4<576:CBEFHC>2.0.ZU;2-8
Abstract
The effective quantum theory of near horizon regions of classical four-dime nsional spatially Aat, Friedman-Robertson-Walker spacetimes is shown to be approximately a two-dimensional conformal field theory. The central charge and expectation value of the Hamiltonian of this theory, and the statistica l entropy of horizon states which can be calculated using Cardy's formula, are all proportional to the horizon area in units of Newton's constant. The proportionality constant which is determined by Planck scare physics can b e fixed such that the entropy is equal to a quarter of the horizon area in units of Newton's constant, in agreement with thermodynamic considerations.