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Escape from supercooling with or without bubbles: gravitational wave signatures
- Source :
- European Physical Journal C: Particles and Fields, Vol 81, Iss 9, Pp 1-11 (2021), European Physical Journal
- Publication Year :
- 2021
- Publisher :
- SpringerOpen, 2021.
-
Abstract
- Quasi-conformal models are an appealing scenario that can offer naturally a strongly supercooled phase transition and a period of thermal inflation in the early Universe. A crucial aspect for the viability of these models is how the Universe escapes from the supercooled state. One possibility is that thermal inflation phase ends by nucleation and percolation of true vacuum bubbles. This route is not, however, always efficient. In such case another escape mechanism, based on the growth of quantum fluctuations of the scalar field that eventually destabilize the false vacuum, becomes relevant. We study both of these cases in detail in a simple yet representative model. We determine the duration of the thermal inflation, the curvature power spectrum generated for the scales that exit horizon during the thermal inflation, and the stochastic gravitational wave background from the phase transition. We show that these gravitational waves provide an observable signal from the thermal inflation in almost the entire parameter space of interest. Furthermore, the shape of the gravitational wave spectrum can be used to ascertain how the Universe escaped from supercooling.<br />Comment: 11 pages, 6 figures. published version
- Subjects :
- High Energy Physics - Theory
Phase transition
Cosmology and Nongalactic Astrophysics (astro-ph.CO)
Physics and Astronomy (miscellaneous)
media_common.quotation_subject
FOS: Physical sciences
QC770-798
Astrophysics
Gravitational wave background
General Relativity and Quantum Cosmology
High Energy Physics - Phenomenology (hep-ph)
Nuclear and particle physics. Atomic energy. Radioactivity
Engineering (miscellaneous)
Quantum fluctuation
media_common
Physics
Inflation (cosmology)
Gravitational wave
Observable
Mechanics
Universe
QB460-466
High Energy Physics - Phenomenology
High Energy Physics - Theory (hep-th)
False vacuum
Astrophysics - Cosmology and Nongalactic Astrophysics
Subjects
Details
- Language :
- English
- ISSN :
- 14346052 and 14346044
- Volume :
- 81
- Issue :
- 9
- Database :
- OpenAIRE
- Journal :
- European Physical Journal C: Particles and Fields
- Accession number :
- edsair.doi.dedup.....a5ecb1527736787c91e6a51f7d0d57d7