New Sources of Gravitational Waves during Inflation

Details New Sources of Gravitational Waves during Inflation New Sources of Gravitational Waves during Inflation

2011-09-02

arxiv.org/abs/1109.0542v1

Physics

High Energy Physics

High Energy Physics - Theory

32 pages, 1 figure

Scientific paper

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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