Results 11 to 20 of about 149,223,535 (289)
Phase transitions in the early universe [PDF]
, 2023 Phase transitions are a generic prediction of models in particle physics. In the Standard Model, for example, there are two phase transitions: the QCD confinement transition and the electroweak phase transition, both occurring in the very early stages of the universe. Many extensions to the Standard Model predict new phase transitions, all occurring at
Nee, Michael
openaire +3 more sources
SUPERCOOLING AND NUCLEATION IN PHASE TRANSITIONS OF THE EARLY UNIVERSE [PDF]
Modern Physics Letters A, 1996 The three phase transitions (the GUT, the electroweak and the quark-hadron), which the universe is assumed to have undergone, produce very important physical effects if they are assumed to be of first-order. It is also important that enough supercooling is produced at these transitions so that the rate of nucleation of the lower temperature phase out ...
Banerjee, B., Gavai, R. V.
openaire +4 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.
T. W. B. Kibble
openaire +3 more sources
Quark-hadron phase transitions in the viscous early universe [PDF]
Physical Review D, 2012 Based on hot big bang theory, the cosmological matter is conjectured to undergo QCD phase transition(s) to hadrons, when the universe was about $1-10 μ$s old. In the present work, we study the quark-hadron phase transition, by taking into account the effect of the bulk viscosity.
Harko, TC, Tawfik, T
openaire +6 more sources
How fast does the WallGo? A package for computing wall velocities in first-order phase transitions [PDF]
Journal of High Energy PhysicsWallGo is an open-source software designed to compute the bubble wall velocity in first-order cosmological phase transitions. Additionally, it evaluates the energy budget available for generating gravitational waves.
Andreas Ekstedt +6 more
doaj +2 more sources
ASTROPHYSICAL OBSERVATIONS OF EARLY UNIVERSE PHASE TRANSITIONS [PDF]
Modern Physics Letters A, 2004 After a review of CMBR correlations and recent observations, a study of possible CMBR observations of the QCD early universe phase transition is discussed. A model for the QCD bubble walls gives the surface tension found in lattice calculations, and a 1+1 dimensional treatment in this model for bubble collisions shows an interior gluonic wall, a disk ...
openaire +2 more sources
Phase transitions in single neurons and neural populations: Critical slowing, anesthesia, and sleep cycles [PDF]
, 2010 The firing of an action potential by a biological neuron represents a dramatic transition from small-scale linear stochastics (subthreshold voltage fluctuations) to gross-scale nonlinear dynamics (birth of a 1-ms voltage spike). In populations of neurons
Steyn-Ross, Moira L. +3 more
core +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 +1 more
openaire +3 more sources
Dark radiation as a probe for a phase transition in the early Universe
Physical Review D, 2022 The cosmological constant is not necessarily small in the early universe. If a scalar field obtains a vacuum expectation value after a phase transition (PT), a possibly large cosmological constant could present before PT. The early cosmological constant (ECC) and the PT process may be detectable from dark radiation (DR) today, such as in the cosmic ...
Zihang Wang, Lijing Shao
openaire +2 more sources
Probing early Universe supercooled phase transitions with gravitational wave data
, 2023 : We investigate the reach of the LIGO/Virgo/KAGRA detectors in the search for signatures of first-order phase transitions in the early Universe.
Fornal, Bartosz +10 more
core +2 more sources