Gravitational waves produced by domain walls during inflation

Apr 5, 2023
14 pages
Published in:
  • Phys.Rev.D 109 (2024) 12, 123508
  • Published: Jun 3, 2024
e-Print:
DOI:

Citations per year

20222023202401710
Abstract: (APS)
We study the properties of the stochastic gravitational-wave background (SGWB) produced by domain walls (DWs) during inflation without forming a network. We numerically simulate the DW production caused by a second-order phase transition and calculate the SGWB spectrum using a 1000×1000×1000 lattice. We show that the SGWB can be observed directly by future terrestrial and space gravitational-wave detectors and through the B-mode spectrum in the cosmic microwave background. With numerical simulations, we derive an empirical formula for the strength and qualitative features of the SGWB spectrum. The details of the SGWB spectrum also contain information about the later evolution of the Universe.
Note:
  • 5 pages, 7 figures + appendix
  • gravitational radiation: background
  • gravitational radiation: stochastic
  • domain wall
  • inflation
  • gravitational radiation detector
  • noise
  • critical phenomena
  • network
  • cosmic background radiation: B-mode
  • cosmic background radiation: power spectrum