Anisotropic constant-roll inflation for the Dirac-Born-Infeld model

Abstract

In this paper, we study a non-canonical extension of a supergravity-motivated model acting as a vivid counterexample to the cosmic no-hair conjecture due to its unusual coupling between scalar and electromagnetic fields. In particular, a canonical scalar field is replaced by the string-inspired Dirac-Born-Infeld one in this extension. As a result, exact anisotropic inflationary solutions for this Dirac-Born-Infeld model are figured out under a constant-roll condition. Furthermore, numerical calculations are performed to verify that these anisotropic constant-roll solutions are indeed attractive during their inflationary phase.

14 pages, 14 figures. Matches the published version. All results are not changed. Comments are welcome

References in corpus (21)

• Observational Signatures and Non-Gaussianities of General Single Field Inflation
• Inflationary Universe with Anisotropic Hair
• A Microscopic Limit on Gravitational Waves from D-brane Inflation
• The Nature of Primordial Fluctuations from Anisotropic Inflation
• Scalar-Scalar, Scalar-Tensor, and Tensor-Tensor Correlators from Anisotropic Inflation
• Predictions from an anisotropic inflationary era
• Inflationary perturbations in anisotropic backgrounds and their imprint on the CMB
• Anisotropic Power-law Inflation
• On the evolution of universes in quadratic theories of gravity
• Asymmetric Beams and CMB Statistical Anisotropy
• Imprints of anisotropic inflation on the cosmic microwave background
• Anisotropic Inflation from Charged Scalar Fields
• Reheating in Constant-roll $F(R)$ Gravity
• Primordial Fluctuations from Inflation with a Triad of Background Gauge Fields
• On Power Law Inflation in DBI Models
• Percent-Level Test of Isotropic Expansion Using Type Ia Supernovae
• Constant-roll $k$-Inflation Dynamics
• Anisotropic power-law inflation in a two-scalar-field model with a mixed kinetic term
• Inflation in DBI models with constant gamma
• General quadrupolar statistical anisotropy: Planck limits
• Nonminimal coupling inflation with constant slow roll

Cited by in corpus (1)

• Swampland conjectures in hybrid metric-Palatini gravity