PERTURBATIONS OF EXTENDED INFLATION

被引：14

作者：

DERUELLE, N ^{[1
]}

GUNDLACH, C ^{[1
]}

LANGLOIS, D ^{[1
]}

机构：

[1] UNIV CAMBRIDGE, DEPT APPL MATH & THEORET PHYS, CAMBRIDGE CB3 9EW, ENGLAND

来源：

PHYSICAL REVIEW D | 1992年 / 45卷 / 10期

关键词：

D O I：

10.1103/PhysRevD.45.R3301

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Perturbing the metric, the inflaton (scalar matter), and the dilaton (Brans-Dicke scalar) of extended inflation, the Lagrangian of quadratic order for the two true, gauge-invariant degrees of freedom of the perturbations is derived. This result should allow a rigorous analysis of the initial spectrum of density fluctuations in all models of extended inflation (i.e., with a self-interacting dilaton field). As an immediate application we show that in the particular case of old extended inflation, where the inflaton is trapped at a false-vacuum local minimum of its potential, its fluctuation does not contribute to the density perturbation, thus confirming earlier approximate calculations.

引用

页码：R3301 / R3303

页数：3

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