New inflationary cosmology

Thesis/Dissertation · Sat Jan 01 04:00:00 EST 1983

OSTI ID:6828254

Albrecht, A J

The spontaneous symmetry breaking phase transitions in the early universe predicted by grand unified models are studied. Some of these models predict that during the phase transition the universe experienced a period where potential energy dominated the total energy density and caused the size of the universe to increase exponentially with time. It is shown that in special models the exponential expansion can continue even after the phase transition is well underway and, in these cases, once the transition is completed and the universe is describable by the standard Friedmann-Robertson-Walker cosmology, the necessary special conditions of the standard hot big bang model have been realized in a natural way and the monopoles are not overabundant. The general mechanism demonstrated looks promising as a solution to the horizon, flatness, and monopole problems, although specific models considered so far are not completely satisfactory. The standard SU(5) grand unified model and a supersymmetric model which employs the ''Written reverse hierarchy mechanism'' to dynamically generate the grand unification scale are studied in detail.

• Research Organization: Pennsylvania Univ., Philadelphia (USA)
• OSTI ID: 6828254
• Country of Publication: United States
• Language: English

Related Subjects

640106* -- Astrophysics & Cosmology-- Cosmology
645400 -- High Energy Physics-- Field Theory
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
COSMOLOGY
ELEMENTARY PARTICLES
ENERGY DENSITY
EXPANSION
FIELD THEORIES
GRAND UNIFIED THEORY
LIE GROUPS
MAGNETIC MONOPOLES
MATHEMATICAL MODELS
MONOPOLES
PARTICLE MODELS
PHASE TRANSFORMATIONS
POSTULATED PARTICLES
SU GROUPS
SU-5 GROUPS
SUPERSYMMETRY
SYMMETRY
SYMMETRY BREAKING
SYMMETRY GROUPS
UNIFIED GAUGE MODELS
UNIFIED-FIELD THEORIES
UNIVERSE