Preprint

PUBDB-2021-03536

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Effect of density fluctuations on gravitational wave production in first-order phase transitions

Jinno, R.Extern* ; Rubira, H.DESY* ; Konstandin, T.DESY* ; Vis, J. M. v. d. (Corresponding author)DESY*

2021

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Please use a persistent id in citations: doi:10.3204/PUBDB-2021-03536

Report No.: DESY-21-131; arXiv:2108.11947

Abstract: We study the effect of density perturbations on the process of first-order phase transitions and gravitational wave production in the early Universe. We are mainly interested in how the distribution of nucleated bubbles is affected by fluctuations in the local temperature. We find that large-scale density fluctuations ($H_* < k_* < \beta$) result in a larger effective bubble size at the time of collision, enhancing the produced amplitude of gravitational waves. The amplitude of the density fluctuations necessary for this enhancement is ${\cal P}_\zeta (k_*) \gtrsim (\beta / H_*)^{-2}$, and therefore the gravitational wave signal from first-order phase transitions with relatively large $\beta / H_*$ can be significantly enhanced by this mechanism even for fluctuations with moderate amplitudes.

Keyword(s): density: fluctuation ; effect: density ; density: perturbation ; bubble: size ; gravitational radiation: emission ; bubble: nucleation ; critical phenomena ; temperature: fluctuation ; cosmological phase transitions ; gravitational waves / sources

Note: 22 pages, 14 figures

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Contributing Institute(s):

1. Theorie-Gruppe (T)

Research Program(s):

1. 611 - Fundamental Particles and Forces (POF4-611) (POF4-611)

Experiment(s):

1. No specific instrument

Appears in the scientific report 2021

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Database coverage:
; ; ; Clarivate Analytics Master Journal List ; Current Contents - Physical, Chemical and Earth Sciences ; Essential Science Indicators ; Nationallizenz ; Published ; SCOPUS ; Science Citation Index Expanded ; Web of Science Core Collection

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Linked articles:

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Journal Article Jinno, R.Extern* ; Konstandin, T.DESY* ; Rubira, H.DESY* ; van de Vis, J. (Corresponding author)DESY*
Effect of density fluctuations on gravitational wave production in first-order phase transitions
Journal of cosmology and astroparticle physics 2021(12), 019 (2021) [10.1088/1475-7516/2021/12/019]2021     Files  Fulltext by arXiv.org BibTeX | EndNote: XML, Text | RIS

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