Inflationary magnetogenesis with a self-consistent coupling function

Abstract

In this paper, we discuss the inflationary magnetogenesis scenario, in which the coupling function is introduced to break the conformal invariance of electromagnetic action. Unlike in conventional models, we deduce the Maxwell's equations under the perturbed FRW metric. We found that, the self-consistency of the action depends on the form of the coupling function when the scalar mode perturbations have been considered. Therefore, this self-consistency can be seen as a restriction on the coupling function. In this paper, we give the restrictive equation for coupling function then obtain the specific form of the coupling function in a simple model. We found that the coupling function depends on the potential of the inflaton and thus is model dependent. We obtain the power spectrum of electric field and magnetic field in large-field inflation model. We also found that the coupling function is a incresing function of time during slow-roll era as most of inflationary magnetogenesis models, it will lead to strong coupling problem. This issue is discussed qualitatively by introducing a correction function during the preheating.

References in corpus (38)

• Magnetic Fields in the Early Universe
• Evidence for strong extragalactic magnetic fields from Fermi observations of TeV blazars
• Origin of Galactic and Extragalactic Magnetic Fields
• Cosmological Magnetic Fields: Their Generation, Evolution and Observation
• A New Radio - X-Ray Probe of Galaxy Cluster Magnetic Fields
• The origin, evolution and signatures of primordial magnetic fields
• The Protogalactic Origin for Cosmic Magnetic Fields
• Primordial magnetogenesis
• Galactic and extragalactic magnetic fields
• EGMF Constraints from Simultaneous GeV-TeV Observations of Blazars
• The Evolution of Cosmic Magnetic Fields: From the Very Early Universe, to Recombination, to the Present
• Primordial Magnetic Fields From String Cosmology
• Generation of Large-Scale Magnetic Fields in Single-Field Inflation
• Large-scale magnetic fields from hydromagnetic turbulence in the very early universe
• Magnetic fields from inflation?
• Primordial Magnetic Fields from Cosmological First Order Phase Transitions
• Breaking Of Conformal Invariance And Electromagnetic Field Generation In The Universe
• Generation of the Primordial Magnetic Fields during Cosmological Reionization
• Microwave Background Signatures of a Primordial Stochastic Magnetic Field
• Parametric Amplification of Gravitational Fluctuations During Reheating
• Gravitational wave production: A strong constraint on primordial magnetic fields
• Search for Spatial Extension in High-Latitude Sources Detected by the Fermi Large Area Telescope
• Tensor Microwave Anisotropies from a Stochastic Magnetic Field
• Magnetic fields in the early universe
• Progress on Cosmological Magnetic Fields
• Consistent generation of magnetic fields in axion inflation models
• Magnetic Fields from QCD Phase Transitions
• Challenges in Inflationary Magnetogenesis: Constraints from Strong Coupling, Backreaction and the Schwinger Effect
• Primordial Magnetic Fields from the Post-Inflationary Universe
• Search for Magnetically Broadened Cascade Emission From Blazars with VERITAS
• The generation of helical magnetic field in a viable scenario of Inflationary Magnetogenesis
• Magnetogenesis and the dynamics of internal dimensions
• Early Cosmological Evolution of Primordial Electromagnetic Fields
• Scale-invariant Helical Magnetic Fields from Inflation
• Cosmological Magnetogenesis From Extra-dimensional Gauss Bonnet Gravity
• A scenario for inflationary magnetogenesis without strong coupling problem
• Magnetic Wall From Chiral Phase Transition and CMBR Correlations
• Gravitational wave generation in a viable scenario of inflationary magnetogenesis

Cited by in corpus (5)

• Probing Reheating Phase via Non-Helical Magnetogenesis and Secondary Gravitational Waves
• Minimal Magnetogenesis: The Role of Inflationary Perturbations and ALPs, and Its Gravitational Wave Signatures
• Magnetogenesis from Sawtooth Coupling: Gravitational Wave Probe of Reheating
• Inflationary magnetogenesis of primordial magnetic fields with multiple vector fields
• The Impact of Inhomogeneous Perturbations of the Inflaton on the Cosmological Primordial Magnetic Field