Gravitational wave spectra from strongly supercooled phase transitions
2020 ◽
Vol 80
(11)
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Keyword(s):
Omega 3
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AbstractWe study gravitational wave (GW) production in strongly supercooled cosmological phase transitions, taking particular care of models featuring a complex scalar field with a U(1) symmetric potential. We perform lattice simulations of two-bubble collisions to properly model the scalar field gradients, and compute the GW spectrum sourced by them using the thin-wall approximation in many-bubble simulations. We find that in the U(1) symmetric case the low-frequency spectrum is $$\propto \omega $$ ∝ ω whereas for a real scalar field it is $$\propto \omega ^3$$ ∝ ω 3 . In both cases the spectrum decays as $$\omega ^{-2}$$ ω - 2 at high frequencies.
1981 ◽
Vol 48
(1)
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pp. 572-579
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Keyword(s):
2020 ◽
Vol 29
(11)
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pp. 2041002
Keyword(s):
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