Density fluctuations from warm inflation

被引：113

作者：

Graham, Chris ^{[1
]}

Moss, Ian G. ^{[1
]}

机构：

[1] Univ Newcastle, Sch Math & Stat, Newcastle Upon Tyne NE1 7RU, Tyne & Wear, England

来源：

JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS | 2009年 / 07期

关键词：

inflation; cosmological perturbation theory; COSMOLOGICAL PERTURBATIONS; SYMMETRY-BREAKING; QUANTUM-FIELDS; DYNAMICS; FLATNESS; UNIVERSE; HORIZON; MODELS;

D O I：

10.1088/1475-7516/2009/07/013

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Thermal fluctuations provide the main source of large scale density perturbations in warm inflationary models of the early universe. For the first time, general results are obtained for the power spectrum in the case when the friction coefficient in the inflaton equation of motion depends on temperature. A large increase in the amplitude of perturbations occurs when the friction coefficient increases with temperature. This has to be taken into account when constructing models of warm inflation. New results are also given for the thermal fluctuations in the weak regime of warm inflation when the friction coefficient is relatively small.

引用

页数：19

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