A New Class of Non-canonical Conformal Attractors for Multifield Inflation

Abstract

We propose a new broad class of multi-field non-canonical inflationary models as an extension of multi-field conformal cosmological attractors. This also generalizes the recently discovered class of non-canonical conformal attractors for single field inflation. Kinetic terms of this class of models are phenomenologically arising from $\mathcal{N}=1$ supergravity and from $\mathcal{N}=1$ superconformal theory, with two conformal scalar compensator fields in the latter. We show that the inflationary dynamics and predictions of this class of models are stable with respect to the significant modification of both radial and angular part of the potential, but it is very sensitive to its minuscule modification in the geometry of the field space metric. We also show that our framework can pass the latest observational constraints set by Planck 2018.

arXiv comment23 pages, 5 figures, Published version

References in corpus (27)

• Non-Gaussian features of primordial fluctuations in single field inflationary models
• A General Analytic Formula for the Spectral Index of the Density Perturbations produced during Inflation
• Universality Class in Conformal Inflation
• Superconformal Inflationary $\alpha$-Attractors
• The inflationary prediction for primordial non-gaussianity
• Planck 2015 results. XVII. Constraints on primordial non-Gaussianity
• Natural Chaotic Inflation in Supergravity
• The Unity of Cosmological Attractors
• Non-minimal Inflationary Attractors
• Adiabatic and Isocurvature Perturbations for Multifield Generalized Einstein Models
• Multi-field Conformal Cosmological Attractors
• Superconformal Symmetry, Supergravity and Cosmology
• Cosmological perturbations from multi-field inflation in generalized Einstein theories
• Primordial Bispectrum from Multifield Inflation with Nonminimal Couplings
• The Hyperbolic Geometry of Cosmological Attractors
• Dark energy, $\alpha$-attractors, and large-scale structure surveys
• Running Kinetic Inflation
• Escher in the Sky
• Cosmological Attractors from $\alpha$-Scale Supergravity
• Linear Inflation from Running Kinetic Term in Supergravity
• Multifield Dynamics of Higgs Inflation
• Seven-Disk Manifold, alpha-attractors and B-modes
• Universality of multi-field $\alpha$-attractors
• Maximal Supersymmetry and B-Mode Targets
• Hypernatural inflation
• Cosmological $\alpha$-Attractors and de Sitter Landscape
• Pole N-flation

Cited by in corpus (1)

• Non-canonical Conformal Attractors for Single Field Inflation