Critical constraint on inflationary magnetogenesis

Abstract

Recently, there are several reports that the cosmic magnetic fields on Mpc scale in void region is larger than $\sim 10^{-15}$G with an uncertainty of a few orders from the current blazar observations. On the other hand, in inflationary magnetogenesis models, additional primordial curvature perturbations are inevitably produced from iso-curvature perturbations due to generated electromagnetic fields. We explore such induced curvature perturbations in a model independent way and obtained a severe upper bound for the energy scale of inflation from the observed cosmic magnetic fields and the observed amplitude of the curvature perturbation, as ${\rho }_{\inf }^{1/4}<30\mathrm{GeV}\times (B_{\mathrm{obs}}/10^{-15}\mathrm{G}{)}^{-1}$ where $B_{\mathrm{obs}}$ is the strength of the magnetic field at present. Therefore, without a dedicated low energy inflation model or an additional amplification of magnetic fields after inflation, inflationary magnetogenesis on Mpc scale is generally incompatible with CMB observations.

16 pages, 1 figure, references added, a numerical error fixed. Accepted for publication in JCAP

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Cited by in corpus (42)

• Primordial Gravitational Waves from Axion-Gauge Fields Dynamics
• Adding helicity to inflationary magnetogenesis
• Consistent generation of magnetic fields in axion inflation models
• Constraints on the Intergalactic Magnetic Field with Gamma-Ray Observations of Blazars
• Large-scale magnetic fields can explain the baryon asymmetry of the Universe
• Inflationary Magnetogenesis without the Strong Coupling Problem II: Constraints from CMB anisotropies and B-modes
• Primordial Magnetic Fields from the Post-Inflationary Universe
• Early Cosmological Evolution of Primordial Electromagnetic Fields
• Pre-reheating Magnetogenesis in the Kinetic Coupling Model
• Stable solutions of inflation driven by vector fields
• Scale-invariant Helical Magnetic Fields from Inflation
• Light Dark Photon Dark Matter from Inflation
• A scenario for inflationary magnetogenesis without strong coupling problem
• Cosmic Magnetism in Centimeter and Meter Wavelength Radio Astronomy
• Constraints on Primordial Magnetic Fields from Inflation
• Mixed Non-Gaussianity from Axion-Gauge Field Dynamics
• Chiral Gravitational Waves Produced in a Helical Magnetogenesis Model
• Vacuum birefringence and the Schwinger effect in (3+1) de Sitter
• Statistically Anisotropic Tensor Modes from Inflation
• Magnetic field spectrum at cosmological recombination revisited
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• Generation of large-scale magnetic fields, non-Gaussianity, and primordial gravitational waves in inflationary cosmology
• Generation of Primordial Black Holes and Gravitational Waves from Dilaton-Gauge Field Dynamics
• Probing correlations of early magnetic fields using mu-distortion
• Scalar perturbations from inflation in the presence of gauge fields
• Revisiting Magnetogenesis during Inflation
• Inflationary magneto-(non)genesis, increasing kinetic couplings, and the strong coupling problem
• Inflationary Magnetogenesis with Broken Local U(1) Symmetry
• Stealth magnetic field in de Sitter spacetime
• Primordial perturbations from dilaton-induced gauge fields
• Role of matter in gravitation: going beyond the Einstein-Maxwell theory
• Probing the reheating phase through primordial magnetic field and CMB
• Gravitational wave trispectrum in the axion-SU(2) model
• Warm inflation in the presence of magnetic fields
• Inflationary dynamics of kinetically-coupled gauge fields
• Parton splitting scales of reclustered large-radius jets in high-energy nuclear collisions
• Narrowing the window of inflationary magnetogenesis
• Primordial Helical Magnetic Fields from Inflation?
• Dynamics of Electroweak Gauge Fields during and after Higgs Inflation
• Effect of magnetic field on jet transport coefficient $\hat{q}$
• Non-conformal evolution of magnetic fields during reheating
• Primordial magnetic fields in the $f^{2}FF$ model in large field inflation under de Sitter and power law expansion