PERTURBATIVE METHOD TO SOLVE 4TH-ORDER GRAVITY-FIELD EQUATIONS

被引:29
作者
CAMPANELLI, M
LOUSTO, CO
AUDRETSCH, J
机构
[1] UNIV AUTONOMA BARCELONA,IFAE,FIS TEOR GRP,E-08193 BARCELONA,SPAIN
[2] INST ASTRON & FIS ESPACIO,RA-1428 BUENOS AIRES,ARGENTINA
来源
PHYSICAL REVIEW D | 1994年 / 49卷 / 10期
关键词
D O I
10.1103/PhysRevD.49.5188
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
We develop a method for solving the field equations of a quadratic gravitational theory coupled to matter. The quadratic terms are written as a function of the matter stress tensor and its derivatives in such a way as to have, order by order, a set of Einstein field equations with an effective T(munu). We study the cosmological scenario recovering the de Sitter exact solution, and the first order (in the coupling constants alpha and beta appearing in the gravitational Lagrangian) solution to the gauge cosmic string metric and the charged black hole. For this last solution we discuss the consequences on the thermodynamics of black holes, and, in particular, the entropy-area relation which gets additional terms to the usual A/4 value.
引用
收藏
页码:5188 / 5193
页数:6
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