Anisotropic power-law inflation for models of non-canonical scalar fields non-minimally coupled to a two-form field
arXiv:2309.02690 · doi:10.1140/epjc/s10052-024-12436-y
Abstract
In this paper, we investigate the validity of the so-called cosmic no-hair conjecture in the framework of anisotropic inflation models of non-canonical scalar fields non-minimally coupled to a two-form field. In particular, we focus on two typical {\it k}-inflation and Dirac-Born-Infeld inflation models, in which we find a set of exact anisotropic power-law inflationary solutions. Interestingly, these solutions are shown to be stable and attractive during an inflationary phase using the dynamical system analysis. The obtained results indicate that the non-minimal coupling between the scalar and two-form fields acts as a non-trivial source of generating stable spatial anisotropies during the inflationary phase and therefore violates the prediction of the cosmic no-hair conjecture, even when the scalar field is of non-canonical forms. In connection with the Planck 2018 data, tensor-to-scalar ratios of these anisotropic solutions are investigated. As a result, it appears that the tensor-to-scalar ratio of the anisotropic power-law inflationary solution of {\it k}-inflation model turns out to be more highly consistent with the Planck 2018 data than that of Dirac-Born-Infeld model.
arXiv comment24 pages, 8 figures. Final version with investigations on the tensor-to-scalar ratio added. Some discussions and relevant references are also added. All calculations remain unchanged. Accepted for publication in EPJC. Comments are welcome
References in corpus (51)
- Nine-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Cosmological Parameter Results
- k-Inflation
- Perturbations in k-inflation
- DBI in the Sky
- Observational Signatures and Non-Gaussianities of General Single Field Inflation
- Scalar Speed Limits and Cosmology: Acceleration from D-cceleration
- Superstring Cosmology
- Inflationary Universe with Anisotropic Hair
- Gauge Fields and Inflation
- CMB Anomalies after Planck
- Imprints of a Primordial Preferred Direction on the Microwave Background
- Is the Observable Universe Consistent with the Cosmological Principle?
- Recent Advances on Inflation
- A Microscopic Limit on Gravitational Waves from D-brane Inflation
- The anisotropic power spectrum and bispectrum in the f(phi) F^2 mechanism
- The Nature of Primordial Fluctuations from Anisotropic Inflation
- Scalar-Scalar, Scalar-Tensor, and Tensor-Tensor Correlators from Anisotropic Inflation
- Statistical Anisotropy from Anisotropic Inflation
- Predictions from an anisotropic inflationary era
- Inflationary perturbations in anisotropic backgrounds and their imprint on the CMB
- Anisotropic Power-law Inflation
- Primordial Power Spectra from Anisotropic Inflation
- Limits on anisotropic inflation from the Planck data
- Observational Challenges for the Standard FLRW Model
- Imprints of anisotropic inflation on the cosmic microwave background
- Bayesian analysis of an anisotropic universe model: systematics and polarization
- Anisotropic Non-Gaussianity from a Two-Form Field
- The inflationary universe in F(R) gravity with antisymmetric tensor fields and their suppression during the universe evolution
- Simple Types of Anisotropic Inflation
- Anisotropic power-law k-inflation
- Observational signatures of anisotropic inflationary models
- Logarithmic-corrected Gravity Inflation in the Presence of Kalb-Ramond Fields
- Designing Anisotropic Inflation with Form Fields
- Constraining anisotropic models of the early Universe with WMAP9 data
- On The Existence Of Anisotropic Cosmological Models In Higher-Order Theories Of Gravity
- Anisotropy screening in Horndeski cosmologies
- Limits on statistical anisotropy from BOSS DR12 galaxies using bipolar spherical harmonics
- Anisotropic cosmological models in Horndeski gravity
- Anisotropic -form dark energy
- Formalizing Anisotropic Inflation in Modified Gravity
- Anisotropic Inflation with Derivative Couplings
- General quadrupolar statistical anisotropy: Planck limits
- Self-anisotropizing inflationary universe in Horndeski theory and beyond
- Anisotropic inflation with coupled -forms
- Anisotropic constant-roll inflation for the Dirac-Born-Infeld model
- Stable small spatial hairs in a power-law k-inflation model
- Anisotropic Scalar Field Dark Energy with a Disformally Coupled Yang-Mills Field
- CMB imprints of non-canonical anisotropic inflation
- Topological mass generation and forms
- Cosmological quantum entanglement : A possible testbed for the existence of Kalb-Ramond field
- Inflation with two-form field: the production of primordial black holes and gravitational waves