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.