Expansion isotropization during the inflationary era

Journal Article · Fri Nov 15 00:00:00 EST 1985 · Phys. Rev. D; (United States)

DOI:https://doi.org/10.1103/PhysRevD.32.2522· OSTI ID:6389653

Gron, O

A solution of Einstein's field equations for a vacuum with flat, anisotropic three-space and a nonvanishing cosmological constant is derived. It represents a generalization of the flat de Sitter solution to the anisotropic case. This solution describes a universe model entering the Guth inflationary era at t/sub 1/ = 10/sup -35/ sec as an anisotropic Kasner universe, and terminating this era at t/sub 2/ = 1.3 x 10/sup -33/ sec as an isotropic de Sitter universe. The mean expansion anisotropy has decreased by a factor of order 10/sup -168/ during the inflationary era. The properties of this solution imply that the transition to an inflationary era is not prevented by any amount of anisotropy. The mean expansion isotropization of the most general homogeneous universe models with anisotropic curved three-space is estimated, and the anisotropy is now found to decrease by a factor of order 10/sup -112/ during the Guth inflationary era.

• Research Organization: Institute of Physics, University of Oslo, Oslo, Norway
• OSTI ID: 6389653
• Journal Information: Phys. Rev. D; (United States), Vol. 32:10
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
COSMOLOGICAL MODELS
ANISOTROPY
UNIVERSE
EINSTEIN FIELD EQUATIONS
GENERAL RELATIVITY THEORY
GRAND UNIFIED THEORY
HUBBLE EFFECT
MATTER
METRICS
TENSORS
EQUATIONS
FIELD EQUATIONS
FIELD THEORIES
MATHEMATICAL MODELS
PARTICLE MODELS
UNIFIED GAUGE MODELS
UNIFIED-FIELD THEORIES
640106* - Astrophysics & Cosmology- Cosmology