Assisted inflation in Friedmann-Robertson-Walker and Bianchi spacetimes

Abstract

We use exact general solutions for the spatially flat FRW and the anisotropic Bianchi I cosmologies to show that generically uncoupled scalar fields cooperate to make inflation more probable, while the presence of several interacting fields hinders the occurrence of the phenomenon, in accordance with previous results based on particular power-law solutions. Similar conclusions are reached in the case of Bianchi VI${}_0$ spacetimes, for power-law solutions which are proved to be attractors.

2 eps figures. To appear in PRD

References in corpus (8)

• A General Analytic Formula for the Spectral Index of the Density Perturbations produced during Inflation
• Assisted inflation
• Generalized Assisted Inflation
• Tree-level String Cosmology
• On the Realization of Assisted Inflation
• Form Invariance of Differential Equations in General Relativity
• Exact Superstring Motivated Cosmological Models
• Inhomogeneous cosmologies with Q-matter and varying $\Lambda$

Cited by in corpus (14)

• Theory of cosmological perturbations in an anisotropic universe
• Predictions from an anisotropic inflationary era
• Quintom cosmologies admitting either tracking or phantom attractors
• Quintom cosmologies with arbitrary potentials
• Dynamics of Logamediate Inflation
• Transient Quintessence from Group Manifold Reductions or how all roads lead to Rome
• Assisted coupled quintessence
• Non-singular Power-law and Assisted inflation in Loop Quantum Cosmology
• Nonlinear electrodynamics in Bianchi spacetimes
• Symmetries leading to inflation
• Stability of multi-field cosmological solutions
• Synergistic warm inflation
• Assisted inflation in Bianchi VI0 cosmologies
• Quantum Quintom Cosmology