EXTENDED GRAVITY THEORIES AND THE EINSTEIN-HILBERT ACTION

被引:291
作者
WANDS, D
机构
[1] Astronomy Centre, School of Mathematical and Physical Sciences, University of Sussex
关键词
D O I
10.1088/0264-9381/11/1/025
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
I discuss the relation between arbitrarily high-order theories of gravity and scalar-tensor gravity at the level of the field equations and the action. I show that (2n + 4)-order gravity is dynamically equivalent to Brans-Dicke gravity with an interaction potential for the Brans-Dicke field and n further scalar fields. This scalar-tensor action is then conformally equivalent to the Einstein-Hilbert action with n + 1 scalar fields. This clarifies the nature and extent of the conformal equivalence between extended gravity theories and general relativity with many scalar fields.
引用
收藏
页码:269 / 279
页数:11
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