Non-Gaussianity and the induced gravitational wave background

Peter Adshead, Kaloian D. Lozanov, Zachary J. Weiner

Research output: Contribution to journalArticlepeer-review


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.

Original languageEnglish (US)
Article number080
JournalJournal of Cosmology and Astroparticle Physics
Issue number10
StatePublished - Oct 2021


  • cosmological perturbation theory
  • gravitational waves / sources
  • gravitational waves / theory
  • primordial black holes

ASJC Scopus subject areas

  • Astronomy and Astrophysics


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