The stochatic gravitational wave background from thermal inflation

Astronomy and Astrophysics – Astrophysics

Scientific paper

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Scientific paper

Thermal inflation is a brief epoch of inflation which may occur at a lower energy scale than standard inflation. We analyze the implications of an epoch of thermal inflation for the detection of the primordial spectrum of gravitational waves in the context of conventional inflationary models as well as in the context of the pre big bang scenario. We show that although thermal inflation leaves a characteristic signal in the spectrum of the gravitational wave background, it makes the detection of the primordial gravitational waves considerably more difficult in the context of conventional inflationary models. However, in the pre big bang scenario where a much more potent signal is possible, the relic gravitational waves remain observable in certain parameter regions.

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