Papers › Leading-order nonlinear gravitational waves from reheating magnetogeneses
Leading-order nonlinear gravitational waves from reheating magnetogeneses
Yutong He, Alberto Roper Pol, Axel Brandenburg
The archive published only this paper's code-link row. Authors, date and abstract are from arXiv's metadata (CC0), read from the Kaggle arXiv metadata snapshot of 2026-09-12 where its title matched the archive's; the title is the archive's.
We study the leading-order nonlinear gravitational waves (GWs) produced by an electromagnetic (EM) stress in reheating magnetogenesis scenarios. Both nonhelical and helical magnetic fields are considered. By numerically solving the linear and leading-order nonlinear GW equations, we find that the GW energy from the latter is usually larger. We compare their differences in terms of the GW spectrum and parameterize the GW energy difference due to the nonlinear term, Δℰ_(GW), in terms of EM energy ℰ_(EM) as Δℰ_(GW)=(p̃ℰ_(EM)/k_*)³, where k_* is the characteristic wave number, p̃=0.84 and $0.88$ are found in the nonhelical and helical cases, respectively, with reheating around the QCD energy scale, while p̃=0.45 is found at the electroweak energy scale. We also compare the polarization spectrum of the linear and nonlinear cases and find that adding the nonlinear term usually yields a decrease in the polarization that is proportional to the EM energy density. We parameterize the fractional polarization suppression as |Δ𝒫_(GW)/𝒫_(GW)|=r̃ ℰ_(EM)/k_* and find r̃ = 1.2 ×10⁻¹, 7.2 ×10⁻⁴, and 3.2 ×10⁻² for the helical cases with reheating temperatures Tᵣ = 300 TeV, 8 GeV, and 120 MeV, respectively. Prospects of observation by pulsar timing arrays, space-based interferometers, and other novel detection proposals are also discussed.
Code
Repository list and official/mentioned flags are the archive's, frozen 2025-07-28. Reachability, where shown, is from one Syntology probe window (2026-09-16 to 2026-09-18); repositories not probed show nothing. GitHub stars are not tracked.
Code Syntology ran Syntology
Not run by Syntology. Nothing on this page verifies that the listed code works.
Results from the paper archive 2025-07-28
No leaderboard rows for this paper in the archive.
Report a problem or propose a change · a person checks every report against the paper or source before anything changes; decisions are listed on /corrections