Journal
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
Volume -, Issue 10, Pages -Publisher
IOP Publishing Ltd
DOI: 10.1088/1475-7516/2021/10/080
Keywords
cosmological perturbation theory; gravitational waves; sources; gravitational waves; theory; primordial black holes
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We studied the impact of scalar metric fluctuations on the generation of gravitational waves, emphasizing the role of primordial non-Gaussianity, especially the disconnected and connected components of the primordial trispectrum. By calculating all contributions, we obtained results for various enhanced primordial curvature power spectra.
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. JCAP10(2021)080
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