Gravitational waves induced by scalar perturbations as probes of the small-scale primordial spectrum

Keisuke Inomata and Tomohiro Nakama
Phys. Rev. D 99, 043511 – Published 11 February 2019

Abstract

Compared to primordial perturbations on large scales, roughly larger than 1 Mpc, those on smaller scales are not severely constrained. We revisit the issue of probing small-scale primordial perturbations using gravitational waves (GWs), based on the fact that, when large-amplitude primordial perturbations on small scales exist, GWs with relatively large amplitudes are induced at second order in scalar perturbations, and these induced GWs can be probed by both existing and planned gravitational-wave projects. We use accurate methods to calculate these induced GWs and take into account sensitivities of different experiments to induced GWs carefully, to report existing and expected limits on the small-scale primordial spectrum.

  • Figure
  • Figure
  • Figure
  • Figure
  • Received 28 December 2018

DOI:https://doi.org/10.1103/PhysRevD.99.043511

© 2019 American Physical Society

Physics Subject Headings (PhySH)

Gravitation, Cosmology & Astrophysics

Authors & Affiliations

Keisuke Inomata1,2 and Tomohiro Nakama3

  • 1ICRR, University of Tokyo, Kashiwa, 277-8582, Japan
  • 2Kavli IPMU (WPI), UTIAS, University of Tokyo, Kashiwa, 277-8583, Japan
  • 3Institute for Advanced Study, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong

Article Text (Subscription Required)

Click to Expand

References (Subscription Required)

Click to Expand
Issue

Vol. 99, Iss. 4 — 15 February 2019

Reuse & Permissions
Access Options
Author publication services for translation and copyediting assistance advertisement

Authorization Required


×
×

Images

×

Sign up to receive regular email alerts from Physical Review D

Log In

Cancel
×

Search


Article Lookup

Paste a citation or DOI

Enter a citation
×