Results 21 to 30 of about 88,270 (291)

First-Order Phase Transitions in an Early-Universe Environment [PDF]

, 2000
In first-order phase transitions in the early universe, the bubble wall is expected to be significantly slowed-down by its interaction with the surrounding plasma.
Lilley, Matthew
core   +3 more sources

Boosted dark matter from primordial black holes produced in a first-order phase transition

Journal of High Energy Physics, 2023
During a cosmological first-order phase transition in a dark sector, fermion dark matter particles χ can form macroscopic Fermi balls that collapse to primordial black holes (PBHs) under certain conditions.
Danny Marfatia, Po-Yan Tseng
doaj   +1 more source

A Little Inflation in the Early Universe at the QCD Phase Transition [PDF]

Physical Review Letters, 2010
We explore a scenario that allows for a strong first order phase-transition of QCD at non-negligible baryon number in the early universe and its possible cosmological observable consequences. The main assumption is a quasi-stable QCD-vacuum state that leads to a short period of inflation, consequently diluting the net baryon to photon ratio to it's ...
Boeckel, Tillmann, Schaffner-Bielich, Jurgen   +1 more
openaire   +3 more sources

Topological Defects and Cosmology [PDF]

, 1998
Many particle physics models of matter admit solutions corresponding to stable or long-lived topological defects. In the context of standard cosmology it is then unavoidable that such defects will form during phase transitions in the very early Universe.
A Abrikosov, A Aguirre, A Albrecht, A Albrecht, A Albrecht, A Cohen, A Cohen, A Cohen, A Cohen, A Dolgov, A Ignatiev, A Nelson, A Sakharov, A Sornborger, A Stebbins, A Stebbins, A Vilenkin, A Vilenkin, A Vilenkin, A Vilenkin, B Allen, B Allen, B Banerjee, B Banerjee, B Carter, D Bennett, D Bennett, D Toussaint, D Vollick, F Klinkhamer, G t’Hooft, H Nielsen, H Sato, I Chuang, J Borrill, J Magueijo, J Preskill, J Silk, L McLerran, L McLerran, L Perivolarapoulos, L Perivolaropoulos, M Bowick, M Dine, M Gleiser, M Hindmarsh, M Joyce, M Joyce, M Joyce, M Salomaa, M Shaposhnikov, M Shaposhnikov, M Trodden, M Yoshimura, N Kaiser, N Manton, N Turok, N Turok, N Turok, N Turok, N Turok, N Turok, N Turok, P Arnold, P Gennes de, P Mähönen, R Brandenberger, R Brandenberger, R Brandenberger, R Brandenberger, R Brandenberger, R Brandenberger, R Brandenberger, R Brandenberger, R Brandenberger, R Brandenberger, R Moessner, R Moessner, R Scherrer, Robert H. Brandenberger, S Dimopoulos, S Weinberg, S White, T Hara, T Hara, T Hara, T Vachaspati, T Vachaspati, T Vachaspati, T W B Kibble, T W B Kibble, U-L Pen, V Kuzmin, V Zanchin, W Hu, W Perkins, Ya B Zeldovich, Ya B Zel’dovich, Ya B Zel’dovich, Ya B Zel’dovich   +99 more
core   +2 more sources

Relevant dilaton stabilization

Journal of High Energy Physics, 2023
We propose a simple modification of the Goldberger-Wise mechanism for stabilizing the scale of spontaneously broken conformal theories. The source of explicit conformal symmetry breaking is a relevant operator with a small coefficient, as opposed to the ...
Csaba Csáki, Michael Geller, Zamir Heller-Algazi, Ameen Ismail   +3 more
doaj   +1 more source

On Topological Defects and Cosmological Constant

, 2013
Einstein introduced Cosmological Constant in his field equations in an ad hoc manner. Cosmological constant plays the role of vacuum energy of the universe which is responsible for the accelerating expansion of the universe.
Kalam, M., Rahaman, F., Raychaudhuri, B.
core   +1 more source

Gravitational Waves from Phase Transitions at the Electroweak Scale and Beyond [PDF]

, 2006
If there was a first order phase transition in the early universe, there should be an associated stochastic background of gravitational waves. In this paper, we point out that the characteristic frequency of the spectrum due to phase transitions which ...
Grojean, Christophe, Servant, Geraldine
core   +2 more sources

Phase Transitions and Topological Defects in the Early Universe [PDF]

Australian Journal of Physics, 1997
Our present theories of particle physics and cosmology, taken together, suggest that very early in its history, the universe underwent a series of phase transitions, at which topological defects, similar to those formed in some condensed matter transitions, may have been created.
openaire   +1 more source

Gravitational waves from the sound of a first order phase transition [PDF]

, 2014
We report on the first three-dimensional numerical simulations of first-order phase transitions in the early Universe to include the cosmic fluid as well as the scalar field order parameter.
C. J. Hogan, D. Kirzhnits, David J. Weir, J. Wilson, Kari Rummukainen, Mark Hindmarsh, Stephan J. Huber   +6 more
core   +2 more sources

Supercooled phase transitions in the very early universe

Physics Letters B, 1982
The universe might have had a prolonged exponentially expanding phase caused by its being stuck in a metastable state of the grand unified phase transition. The only way that it could exit from this exponential expansion without introducing too much inhomogeneity or spatial curvature would be through a homogeneous “bubble” solution in which quantum ...
S.W. Hawking, I.L. Moss
openaire   +1 more source