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Gravitational waves from vacuum first-order phase transitions: from the envelope to the lattice
journal contribution
posted on 2023-06-09, 18:17 authored by Daniel Cutting, Mark HindmarshMark Hindmarsh, David J WeirWe conduct large scale numerical simulations of gravitational wave production at a first-order vacuum phase transition. We find a power law for the gravitational wave power spectrum at high wave number which falls off as k-1.5 rather than the k-1 produced by the envelope approximation. The peak of the power spectrum is shifted to slightly lower wave numbers from that of the envelope approximation. The envelope approximation reproduces our results for the peak power less well, agreeing only to within an order of magnitude. After the bubbles finish colliding, the scalar field oscillates around the true vacuum. An additional feature is produced in the UV of the gravitational wave power spectrum, and this continues to grow linearly until the end of our simulation. The additional feature peaks at a length scale close to the bubble wall thickness and is shown to have a negligible contribution to the energy in gravitational waves, providing the scalar field mass is much smaller than the Planck mass.
Funding
South-Eastern Particle Theory Alliance Sussex - RHUL - UCL 2017-2020 - Sussex node; G2074; STFC-SCIENCE AND TECHNOLOGY FACILITIES COUNCIL; ST/P000819/1
Theoretical Particle Physics Consortium Sussex - Royal Holloway; G1449; STFC-SCIENCE AND TECHNOLOGY FACILITIES COUNCIL; ST/L000504/1
History
Publication status
- Published
File Version
- Published version
Journal
Physical Review DISSN
2470-0010Publisher
American Physical SocietyExternal DOI
Issue
12Volume
97Page range
123513-1Department affiliated with
- Informatics Publications
Research groups affiliated with
- Theoretical Particle Physics Research Group Publications
Full text available
- Yes
Peer reviewed?
- Yes
Legacy Posted Date
2019-07-02First Open Access (FOA) Date
2019-07-02First Compliant Deposit (FCD) Date
2019-07-01Usage metrics
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