FOURTH-ORDER GRAVITY AS THE INFLATIONARY MODEL REVISITED

被引：29

作者：

Kaneda, Sho ^{[1
]}

Ketov, Sergei V. ^{[1
,2
]}

Watanabe, Natsuki ^{[1
]}

机构：

[1] Tokyo Metropolitan Univ, Dept Phys, Tokyo, Japan

[2] Univ Tokyo, IPMU, Tokyo 1138654, Japan

来源：

MODERN PHYSICS LETTERS A | 2010年 / 25卷 / 32期

关键词：

Cosmology; inflation; modified gravity; spectral index; COSMOLOGY;

D O I：

10.1142/S0217732310033918

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We revisit the old (fourth-order or quadratically generated) gravity model of Starobinsky in four spacetime dimensions, and derive the (inflaton) scalar potential in the equivalent scalar-tensor gravity model. The inflaton scalar potential is used to compute the (CMB) observables of inflation, associated with curvature perturbations (namely, the scalar and tensor spectral indices, and the tensor-to-scalar ratio), including the new next-to-leading order terms with respect to the inverse number of e-foldings. The results are compared to the recent (WMAP5) experimental bounds. We confirm both mathematical and physical equivalence between f(R) gravity theories and the corresponding scalar-tensor gravity theories.

引用

页码：2753 / 2762

页数：10

共 28 条

[1] INFLATION AND THE CONFORMAL STRUCTURE OF HIGHER-ORDER GRAVITY THEORIES [J].