Beating the Lyth bound by parametric resonance during inflation

Abstract

We propose a novel mechanism for enhancing the primordial gravitational waves without significantly affecting the curvature perturbations produced during inflation. This is achieved due to non-linear sourcing of resonantly amplified scalar field fluctuations. Our result is an explicit scale-dependent counter-example of the famous Lyth bound, which opens up a promising perspective of producing detectable inflationary tensor modes with low-scale inflation and a sub-Planckian field excursion. We explicitly demonstrate the testability of our mechanism with upcoming Cosmic Microwave Background B-mode observations.

arXiv commentv1: 6 pages, 2 figures, comments are welcome. v2: 7 pages, 2 figures, updated references, minor modifications, accepted for publication in PRL

References in corpus (62)

• Observation of Gravitational Waves from a Binary Black Hole Merger
• Efficient Computation of CMB anisotropies in closed FRW models
• Planck 2018 results. X. Constraints on inflation
• Towards the Theory of Reheating After Inflation
• Reheating after Inflation
• The Simons Observatory: Science goals and forecasts
• On the Geometry of the String Landscape and the Swampland
• False Vacuum Inflation with Einstein Gravity
• Statistics of Cosmic Microwave Background Polarization
• Signature of Gravity Waves in Polarization of the Microwave Background
• A General Analytic Formula for the Spectral Index of the Density Perturbations produced during Inflation
• Monodromy in the CMB: Gravity Waves and String Inflation
• Gravity Waves and Linear Inflation from Axion Monodromy
• What would we learn by detecting a gravitational wave signal in the cosmic microwave background anisotropy?
• A general proof of the conservation of the curvature perturbation
• Gravitational Wave Spectrum Induced by Primordial Scalar Perturbations
• Beyond LISA: Exploring Future Gravitational Wave Missions
• The cosmological gravitational wave background from primordial density perturbations
• Cosmological Relaxation of the Electroweak Scale
• Reheating in Inflationary Cosmology: Theory and Applications
• Supersymmetry Breaking in the Early Universe
• Gravitational Waves Induced by non-Gaussian Scalar Perturbations
• Science with the space-based interferometer LISA. IV: Probing inflation with gravitational waves
• Gravitational wave background as a probe of the primordial black hole abundance
• Gauge Fields and Inflation
• Detection of B-mode Polarization in the Cosmic Microwave Background with Data from the South Pole Telescope
• Particle production during inflation and gravitational waves detectable by ground-based interferometers
• The Astrophysics of Nanohertz Gravitational Waves
• General Relativistic Dynamics of Irrotational Dust: Cosmological Implications
• The Atacama Cosmology Telescope: Two-Season ACTPol Spectra and Parameters
• Universal infrared scaling of gravitational wave background spectra
• Primordial Black Holes from Sound Speed Resonance during Inflation
• Gauge Fields and Inflation: Chiral Gravitational Waves, Fluctuations and the Lyth Bound
• Primordial Gravitational Waves from Axion-Gauge Fields Dynamics
• Gravitational Waves Induced by Scalar Perturbations with a Lognormal Peak
• Stability analysis of chromo-natural inflation and possible evasion of Lyth's bound
• LiteBIRD: JAXA's new strategic L-class mission for all-sky surveys of cosmic microwave background polarization
• Primordial black holes and gravitational waves from resonant amplification during inflation
• A Measurement of the Cosmic Microwave Background $B$-Mode Polarization Power Spectrum at Sub-Degree Scales from 2 years of POLARBEAR Data
• Finding the chiral gravitational wave background of an axion-SU(2) inflationary model using CMB observations and laser interferometers
• Probing Primordial Gravitational Waves: Ali CMB Polarization Telescope
• Primordial black holes and gravitational waves from parametric amplification of curvature perturbations
• Cosmological Higgs-Axion Interplay for a Naturally Small Electroweak Scale
• Folded Resonant Non-Gaussianity in General Single Field Inflation
• When Primordial Black Holes from Sound Speed Resonance Meet a Stochastic Background of Gravitational Waves
• New Sources of Gravitational Waves during Inflation
• Primordial black holes from sound speed resonance in the inflaton-curvaton mixed scenario
• Non-gaussianity from the bispectrum in general multiple field inflation
• Enhancing Inflationary Tensor Modes through Spectator Fields
• Reconciliation of High Energy Scale Models of Inflation with Planck
• Probing Primordial Features with the Stochastic Gravitational Wave Background
• Measuring the spectrum of primordial gravitational waves with CMB, PTA and Laser Interferometers
• Dirac-Born-Infeld realization of sound speed resonance mechanism for primordial black holes
• Gravitational Waves and the Scale of Inflation
• Does the detection of primordial gravitational waves exclude low energy inflation?
• Sound speed resonance of the stochastic gravitational wave background
• How Well Can We Really Determine the Scale of Inflation?
• A not so short note on the Klein-Gordon equation at second order
• The CLASS 150/220 GHz Polarimeter Array: Design, Assembly, and Characterization
• Observational signatures of the parametric amplification of gravitational waves during reheating after inflation
• Resonant Primordial Gravitational Waves Amplification
• Probing the origin of our universe through primordial gravitational waves by Ali CMB project

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• Generating enhanced primordial GWs during inflation with intermittent violation of NEC and diminishment of GW propagating speed
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• Gravitational dynamics in Higgs inflation: Preinflation and preheating with an auxiliary field
• Parametric resonance of gravitational waves in general scalar-tensor theories
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