Wald's entropy is equal to a quarter of the horizon area in units of the effective gravitational coupling

被引：115

作者：

Brustein, Ram ^{[1
]}

Gorbonos, Dan ^{[2
]}

Hadad, Merav ^{[1
,3
,4
]}

机构：

[1] Ben Gurion Univ Negev, Dept Phys, IL-84105 Beer Sheva, Israel

[2] Univ Alberta, Dept Phys, Edmonton, AB T6G 2G7, Canada

[3] Open Univ, Dept Nat Sci, IL-43107 Raanana, Israel

[4] Ruppin Acad Ctr, Sch Engn, IL-40250 Emek Hefer, Israel

来源：

PHYSICAL REVIEW D | 2009年 / 79卷 / 04期

基金：

以色列科学基金会;

关键词：

BLACK-HOLE ENTROPY;

D O I：

10.1103/PhysRevD.79.044025

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The Bekenstein-Hawking entropy of black holes in Einstein's theory of gravity is equal to a quarter of the horizon area in units of Newton's constant. Wald has proposed that in general theories of gravity the entropy of stationary black holes with bifurcate Killing horizons is a Noether charge which is in general different from the Bekenstein-Hawking entropy. We show that the Noether charge entropy is equal to a quarter of the horizon area in units of the effective gravitational coupling on the horizon defined by the coefficient of the kinetic term of a specific metric perturbation polarization on the horizon. We present several explicit examples of static spherically symmetric black holes.

引用

页数：9

共 20 条

[1] BLACK HOLES AND ENTROPY [J].