Power-law Bianchi type I inflation with multiple vector fields

2025/11/19 by Nguyen, Duy H., Do, Tuan Q.
#Cosmology and Nongalactic Astrophysics (astro-ph.CO) #FOS: Physical sciences #General Relativity and Quantum Cosmology (gr-qc)

paper · doi:10.48550/arxiv.2511.15081

Abstract

We seek power-law Bianchi type I solutions for an inflationary universe in a model with one scalar field non-minimally coupled to three vector fields aligned along the three axes. As a result, we find four types of power-law solutions that are classified according to the number of non-vanishing vector fields. Moreover, we find that all these solutions are stable for certain conditions on the parameters (stability regions), which are described both quantitatively and qualitatively. The attractor property of these solutions is also confirmed by numerical calculations.

Citations

• The Wave Function of the Universe and Inflation
• Inflation from a generalized exponential plateau: towards extra suppressed tensor-to-scalar ratios
• Anisotropic power-law inflation for the Sáez-Ballester theory non-minimally coupled to a vector field
• Observational constraints on vector-like dark energy
• NINE-YEAR WILKINSON MICROWAVE ANISOTROPY PROBE ( WMAP ) OBSERVATIONS: COSMOLOGICAL PARAMETER RESULTS
• A new inflationary universe scenario: A possible solution of the horizon, flatness, homogeneity, isotropy and primordial monopole problems
• A new type of isotropic cosmological models without singularity

Related

• Kaluza-Klein inspired a model of the inflation with the inversed power law potential in Bianchi type-I universe
• Anisotropic power-law inflation for the Sáez-Ballester theory non-minimally coupled to a vector field
• Classical and quantum exact solutions for the anisotropic Bianchi type I in multi-scalar field cosmology with an exponential potential driven inflation
• Robust non-minimal attractors in many-field inflation
• (Slow-)Twisting inflationary attractors