Generalized gravity and a ghost

被引：145

作者：

Chiba, T ^{[1
]}

机构：

[1] Nihon Univ, Coll Humanities & Sci, Dept Phys, Tokyo 1568550, Japan

[2] Natl Astron Observ Japan, Div Theoret Astron, Tokyo 1818588, Japan

来源：

JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS | 2005年 / 03期

关键词：

dark energy theory; inflation; gravity;

D O I：

10.1088/1475-7516/2005/03/008

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We show that generalized gravity theories involving the curvature invariants of the Ricci tensor and the Riemann tensor as well as the Ricci scalar are equivalent to multi-scalar-tensor gravities with four-derivative terms. By expanding the action around a vacuum spacetime, the action is reduced to that of the Einstein gravity with four-derivative terms, and consequently there appears a massive spin-2 ghost in such generalized gravity theories in addition to a massive spin-0.

引用

页码：107 / 113

页数：7

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