Results 291 to 300 of about 87,708 (328)

Ultrarelativistic Phase Transition in the early Universe: The faster the better

openaire   +1 more source

Some of the next articles are maybe not open access.

Related searches:

Phase transitions in the early universe

La Rivista Del Nuovo Cimento Series 3, 1986
On passe en revue les resultats recents obtenus dans les principaux domaines ou la recherche cosmologique et la physique des interactions fondamentales se ...
S. A. Bonometto, A. Masiero
openaire   +1 more source

Phase transitions and formation of bubbles in the early Universe

Physical Review D, 1992
We analyze the bubble-formation process that occurs when there is phase coexistence in the early Universe. In this paper we stress the relevance of determining the surface tension in order to compute some quantities that are relevent to cosmology such as the number density of bubbles, the contrast density, and the most probable sizes of bubbles ...
, Marques, , Ramos
openaire   +2 more sources

Invisible axions and the QCD phase transition in the early Universe

Physical Review D, 1986
We examine, in detail, the conditions under which the quark-hadron phase transition in the early Universe can influence the previously determined upper bound on the axion decay constant f/sub a/< or approx. =5 x 10/sup 12/ GeV. By integrating the axion equation of motion (in general and in a specific model) through the phase transition we find that if ...
, DeGrand, , Kephart, , Weiler
openaire   +2 more sources

Phase transition of the two Higgs doublets in early universe

International Journal of Modern Physics A, 2023
In this paper, we study the phase transition of the two Higgs-doublets model (2HDM) and consider a scenario of a electroweak phase transition at alignment limit. Using the Cornwall–Jackiw–Tomboulis formalism at finite temperature, we consider the phase transition of the aligned 2HDM in the two-loop double-bubble contribution.
Nguyen Tuan Anh, Dinh Thanh Tam
openaire   +1 more source

NONEQUILIBRIUM PHASE TRANSITIONS IN THE EARLY UNIVERSE

Particles and the Universe, 2004
We review the current issues of nonequilibrium phase transitions, in particular, in the early Universe. Phase transitions cannot maintain thermal equilibrium and become nonequilibrium when the thermal relaxation time scale is bigger than the dynamical time scale.
openaire   +1 more source

Modeling a delayed phase transition in the early universe

Journal of Physics G: Nuclear and Particle Physics, 2014
We use an effective field-theoretical model to describe a QCD-type phase transition in the early universe. It is assumed that the formation of a new phase proceeds via supercooling and thermal activation. A subsequent rolling-down process is characterized by a microscopic time scale of a few .
Daniel Yueker, Igor Mishustin, Marcus Bleicher   +2 more
openaire   +1 more source

Phase Transitions in the Early Universe

2001
There are many familiar situations when the properties of some substance change abruptly with temperature T. For example, a liquid may be converted into a vapor or into a solid state. Phase transitions are associated with non-analyticities of the partition function of the system.
openaire   +1 more source

An analytic model for phase transitions in the early Universe

Astronomische Nachrichten, 1985
AbstractA simplified model of the very early Universe is presented for studying the effects of the GUT phase transition on the cosmic evolution and vice versa. An exact description of a strongly first order phase transition is given. Both inflationary and non‐inflationray solutions are obtained.
L. Diósi, B. Lukács, B. Keszthelyi, G. Paál   +3 more
openaire   +1 more source

Phase transitions in the early Universe and their consequences

Philosophical Transactions of the Royal Society of London. Series A, Mathematical and Physical Sciences, 1983
The reasons for believing that a number of phase transitions occurred in the early Universe are reviewed, and their implications discussed. In particular, the current status of the explanation for the observed values of some constants in terms of the ‘inflationary universe’ is examined.
openaire   +1 more source