Bianchi-type string cosmology

Abstract

Bianchi-type string cosmology involves generalizations of the FRW backgrounds with three transitive spacelike Killing symmetries, but without any a priori assumption of isotropy in the 3D sections of homogeneity. With emphasis on those cases with diagonal metrics and vanishing cosmological constant which which have not been previously examined in the literature, the present findings allow an overview and the classification of all Bianchi-type backgrounds. These string solutions (at least to lowest order in alpha prime) offer prototypes for the study of spatial anisotropy and its impact on the dynamics of the early universe.

12 pages, latex, 1 table, no figures

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• Superstring Cosmology
• Vacuum fluctuations in axion-dilaton cosmologies
• Godel Universes in String Theory
• S-duality Invariant Perturbations in String Cosmology
• Inhomogeneous String Cosmologies
• Spatially Homogeneous String Cosmologies
• Stringy Toda Cosmologies
• M-theory resolution of four-dimensional cosmological singularities via U-duality
• Effects of anisotropy and spatial curvature on the pre-big bang scenario
• Inhomogeneous Einstein-Rosen String Cosmology
• Spherical Curvature Inhomogeneities in String Cosmology
• Tilted String Cosmologies
• String Cosmology
• Higher Loop String Cosmology with Moduli and Antisymmetric Tensor Field
• On the initial singularity in Kantowski-Sachs spacetime
• Symmetries for generating string cosmologies
• Non-critical anisotropic Bianchi type $I$ string cosmology with ${\alpha }^{\prime }$-corrections
• Anisotropic homogeneous string cosmology with two-loop corrections
• Mirror Images of String Cosmologies
• Rotation in string cosmology
• On certain cosmological relics of the early string dynamics
• String gravitational equations with Hermitian structure
• 4+1 D homogeneous anisotropic string cosmological models with dilaton and anti-symmetric matter