Lattice simulations find that Higgs preheating after inflaton Z2 symmetry breaking generates a GW spectrum with present-day peak amplitude Ω_gw,0 h² ~ 10^{-10} at f ~ 10^9 Hz.
LATTICEEASY: A Program for lat tice simulations of scalar fields in an expanding universe
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Gravitational Waves from Higgs Preheating after Inflaton $Z_2$-Symmetry Breaking
Lattice simulations find that Higgs preheating after inflaton Z2 symmetry breaking generates a GW spectrum with present-day peak amplitude Ω_gw,0 h² ~ 10^{-10} at f ~ 10^9 Hz.