New sources of gravitational waves during inflation

被引：62
|
作者：
Senatore, Leonardo [1 ,2 ]
Silverstein, Eva [1 ,2 ]
Zaldarriaga, Matias [3 ]
机构：
[1] Stanford Univ, Dept Phys, Stanford, CA 94305 USA
[2] Stanford Univ, SLAC, Stanford, CA 94305 USA
[3] Inst Adv Study, Princeton, NJ 08540 USA
来源：
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS | 2014年 / 08期
基金：
美国国家科学基金会;
关键词：
inflation; gravitational waves and CMBR polarization; non-gaussianity; cosmological perturbation theory;
D O I：
10.1088/1475-7516/2014/08/016
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We point out that detectable inflationary tensor modes can be generated by particle or string sources produced during inflation, consistently with the requirements for inflation and constraints from scalar fluctuations. We show via examples that this effect can dominate over the contribution from quantum fluctuations of the metric, occurring even when the inflationary potential energy is too low to produce a comparable signal. Thus a detection of tensor modes from inflation does not automatically constitute a determination of the inflationary Hubble scale.
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页数：31
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