paper

Gravitational wave spectra from strongly supercooled phase transitions

arXiv:2007.04967 · doi:10.1140/epjc/s10052-020-08589-1

Abstract

We study gravitational wave (GW) production in strongly supercooled cosmological phase transitions, taking particular care of models featuring a complex scalar field with a U 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 symmetric case the low-frequency spectrum is whereas for a real scalar field it is . In both cases the spectrum decays as at high frequencies.

7 pages, 4 figures. published version

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