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Scalar-induced gravitational wave from domain wall perturbation
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Domain walls represent two-dimensional topological defects that emerge from the spontaneous breaking of discrete symmetries in various new physics models. In this study, we undertake the first calculation of gravitational waves produced by scalar perturbations generated from the gravitational wave network. Our findings indicate that the gravitational wave spectrum is notably distinct from that of other sources. This opens up a promising avenue for future gravitational wave experiments aimed at exploring the role of domain walls in the early universe.
Forward citations
Cited by 3 Pith papers
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Primordial Black Hole from Tensor-induced Density Fluctuation: First-order Phase Transitions and Domain Walls
Tensor perturbations from FOPT and domain-wall sources are claimed to induce second-order scalar perturbations large enough to form primordial black holes, potentially all of the dark matter.
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The Domain Wall Soliton's Tension
The one-loop domain wall tension in 3+1d phi^4 theory is computed as m^3/(3λ) + 0.0410959 m^3 under a chosen renormalization scheme.
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Can tensor-scalar induced GWs dominate PTA observations ?
A Bayesian fit to NANOGrav 15-year data finds that tensor-scalar induced gravitational waves plus primordial tensor waves can fit the PTA background, with amplitudes constrained by CMB, BAO, and PBH limits.
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