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paper

Non-Gaussianity and the induced gravitational wave background

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Published 27 October 2021 © 2021 IOP Publishing Ltd and Sissa Medialab
, , Citation Peter Adshead et al JCAP10(2021)080 DOI 10.1088/1475-7516/2021/10/080

1475-7516/2021/10/080

Abstract

Scalar metric fluctuations generically source a spectrum of gravitational waves at second order in perturbation theory, poising gravitational wave experiments as potentially powerful probes of the small-scale curvature power spectrum. We perform a detailed study of the imprint of primordial non-Gaussianity on these induced gravitational waves, emphasizing the role of both the disconnected and connected components of the primoridal trispectrum. Specializing to local-type non-Gaussianity, we numerically compute all contributions and present results for a variety of enhanced primordial curvature power spectra.

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10.1088/1475-7516/2021/10/080