Arya, R and Mishra, AK (2022) Scalar induced gravitational waves from warm inflation. In: Physics of the Dark Universe, 37 .
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Abstract
Stochastic gravitational waves can be induced from the primordial curvature perturbations generated during inflation, through scalar–tensor mode coupling at the second order of cosmological perturbation theory. Here we discuss a model of warm inflation in which large curvature perturbations are generated at the small scales because of inflaton dissipation. These overdense perturbations then collapse at later epoch to form primordial black holes, as was studied in our earlier work (Ref. Arya (2020)), and therefore may also act as a source to the second-order tensor perturbations. In this study, we calculate the spectrum of these secondary gravitational waves from our warm inflationary model. We find that our model leads to a generation of scalar induced gravitational waves (SIGW) over a frequency range ∼ (1–106) Hz. Further, we discuss the detection possibilities of these SIGWs, taking in account the sensitivity of different ongoing and future gravitational wave experiments.
| Item Type: | Journal Article |
|---|---|
| Publication: | Physics of the Dark Universe |
| Publisher: | Elsevier B.V. |
| Additional Information: | The copyright for this article belongs to the Author(s). |
| Keywords: | Primordial black holes; Scalar induced gravitational waves; Warm inflation |
| Department/Centre: | Division of Physical & Mathematical Sciences > Physics |
| Date Deposited: | 31 Oct 2022 08:52 |
| Last Modified: | 31 Oct 2022 08:52 |
| URI: | https://eprints.iisc.ac.in/id/eprint/77644 |
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