Super-horizon resonant magnetogenesis during inflation
arXiv:2210.07050 · doi:10.1103/PhysRevD.107.083517
Abstract
We propose a novel mechanism for significantly enhancing the amplitude of primordial electromagnetic fields during inflation. Similar to existing proposals, our idea is based on parametric resonance effects due to conformal-symmetry-breaking coupling of a gauge field and the inflaton. Our proposed scenario, however, significantly differs from previously studied models, and avoids their shortcomings. We, particularly, construct a viable system where the gauge field is exponentially amplified on super-horizon scales, therefore evading the no-go theorem formulated on the basis of widely encountered drastic back-reaction of the magnetic field energy on the inflationary background. We argue that in order for the resonant scenario to work with a bounded and positive-definite coupling function, a mass term for the gauge sector is required. We compute the spectrum of the produced magnetic fields and demonstrate the compatibility with current observational constraints. We demonstrate that while the magnetic fields do not noticeably back-react on the inflationary background, the non-zero mass term can contribute significantly to the total energy-momentum tensor. We point out the parameter space where the latter issue is absent.
arXiv commentV3: 11 pages, 6 figures (one figure added), accepted for publication in PRD
References in corpus (43)
- Evidence for strong extragalactic magnetic fields from Fermi observations of TeV blazars
- The intergalactic magnetic field constrained by Fermi/LAT observations of the TeV blazar 1ES 0229+200
- Primordial magnetogenesis
- Primordial magnetic fields from pseudo-Goldstone bosons
- Primordial Magnetic Fields From String Cosmology
- Generation of Large-Scale Magnetic Fields in Single-Field Inflation
- Magnetic fields from inflation?
- Extreme TeV blazars and the intergalactic magnetic field
- Large-scale magnetic fields from inflation in dilaton electromagnetism
- Evidence for Gamma-Ray Halos Around Active Galactic Nuclei and the First Measurement of Intergalactic Magnetic Fields
- Determination of intergalactic magnetic fields from gamma ray data
- Cosmological Magnetic Fields from Inflation and Backreaction
- Observable non-gaussianity from gauge field production in slow roll inflation, and a challenging connection with magnetogenesis
- Large-scale magnetic fields in the inflationary universe
- Magnetic fields in the early universe
- Dark energy, -attractors, and large-scale structure surveys
- Inflationary Magnetogenesis without the Strong Coupling Problem
- Constraints on the Intergalactic Magnetic Field with Gamma-Ray Observations of Blazars
- Emergent scale symmetry: Connecting inflation and dark energy
- Scalar Electrodynamics and Primordial Magnetic Fields
- On the QED Effective Action in Time Dependent Electric Backgrounds
- Inflationary Magnetogenesis without the Strong Coupling Problem II: Constraints from CMB anisotropies and B-modes
- Universal upper limit on inflation energy scale from cosmic magnetic field
- Postinflationary vacuum instability and Higgs-inflaton couplings
- Primordial Magnetic Fields from the Post-Inflationary Universe
- Higher order statistics of curvature perturbations in IFF model and its Planck constraints
- Magnetogenesis, spectator fields and CMB signatures
- Resonant magnetic fields from inflation
- Pre-reheating Magnetogenesis in the Kinetic Coupling Model
- Inflation from Charged Scalar and Primordial Magnetic Fields?
- Preheating with Non-Standard Kinetic Term
- Constraints on Primordial Magnetic Fields from Inflation
- Beating the Lyth bound by parametric resonance during inflation
- Magnetogenesis in Higgs-Starobinsky inflation
- Fluctuations of inflationary magnetogenesis
- Resonant magnetogenesis from axions
- Revisiting Magnetogenesis during Inflation
- Helical magnetic fields from Riemann coupling
- Inflationary magneto-(non)genesis, increasing kinetic couplings, and the strong coupling problem
- Capacitor Discharge and Vacuum Resistance in Massless QED_2
- Model-independent constraints in inflationary magnetogenesis
- Large-scale gauge spectra and pseudoscalar couplings
- Backreaction of Schwinger pair creation in massive QED