2019/06/30 by Daniel Cutting, Mark Hindmarsh, David Weir +1 · 4 citations
Physics and Astronomy · #Classical mechanics #Cosmology and Gravitation Theories #Gravitation #Gravitational energy #High-Energy Particle Collisions Research #Kinetic energy #Mechanics #Metastability #Phase transition #Physics #Pulsars and Gravitational Waves Research #Quantum mechanics #Rotational energy #Thermodynamics #astro-ph.CO #hep-ph
paper · pdf · doi:10.1103/physrevlett.125.021302
published as Phys. Rev. Lett. 125, 021302 (2020) · 6+6 pages, 4+8 figures. Movies illustrating the physics in this paper available at https://vimeo.com/showcase/5968055 Updated to reflect published version
openalex publication_date 2020/07/10 · arxiv created 2020/07/19 · arxiv updated 2020/07/21 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We have performed the first three-dimensional simulations of strong first-order thermal phase transitions in the early universe. For deflagrations, we find that the rotational component of the fluid velocity increases as the transition strength is increased. For detonations, however, the rotational velocity component remains constant and small. We also find that the efficiency with which kinetic energy is transferred to the fluid falls below theoretical expectations as we increase the transition strength. The probable origin of the kinetic energy deficit is the formation of reheated droplets of the metastable phase during the collision, slowing the bubble walls. The rate of increase in the gravitational wave energy density for deflagrations in strong transitions is suppressed compared to that predicted in earlier work. This is largely accounted for by the reduction in kinetic energy. Current modeling therefore substantially overestimates the gravitational wave signal for strong transitions with deflagrations, in the most extreme case by a factor of 103. Detonations are less affected.