Non-Gaussianity and the induced gravitational wave background. (arXiv:2105.01659v2 [astro-ph.CO] UPDATED)
<a href="http://arxiv.org/find/astro-ph/1/au:+Adshead_P/0/1/0/all/0/1">Peter Adshead</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Lozanov_K/0/1/0/all/0/1">Kaloian D. Lozanov</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Weiner_Z/0/1/0/all/0/1">Zachary J. Weiner</a>
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.
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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