New Sources of Gravitational Waves during Inflation

Abstract

We point out that detectable inflationary tensor modes can be generated by particle or string sources produced during inflation, consistently with the requirements for inflation and constraints from scalar fluctuations. We show via examples that this effect can dominate over the contribution from quantum fluctuations of the metric, occurring even when the inflationary potential energy is too low to produce a comparable signal. Thus a detection of tensor modes from inflation does not automatically constitute a determination of the inflationary Hubble scale.

32 pages, 1 figure. v2: JCAP published version; some overestimates corrected; main results unchanged

References in corpus (10)

• The Effective Field Theory of Inflation
• Monodromy in the CMB: Gravity Waves and String Inflation
• Effective Field Theory for Inflation
• A Natural Framework for Chaotic Inflation
• An Ignoble Approach to Large Field Inflation
• Trapped Inflation
• Task Force on Cosmic Microwave Background Research
• The Search For Primordial Tensor Modes
• Gravitational waves from first order phase transitions during inflation
• Primordial Gravitational Wave Detectability with Deep Small-Sky CMB Experiments

Cited by in corpus (92)

• Cosmological Backgrounds of Gravitational Waves
• The Quest for B Modes from Inflationary Gravitational Waves
• Cosmological Backgrounds of Gravitational Waves and eLISA/NGO: Phase Transitions, Cosmic Strings and Other Sources
• Inflation Physics from the Cosmic Microwave Background and Large Scale Structure
• Scale-dependent gravitational waves from a rolling axion
• F-term Axion Monodromy Inflation
• New physics from the polarised light of the cosmic microwave background
• Primordial Gravitational Waves from Axion-Gauge Fields Dynamics
• Non-Gaussianities and chiral gravitational waves in natural steep inflation
• Adding helicity to inflationary magnetogenesis
• Exploring Cosmic Origins with CORE: Inflation
• Productive Interactions: heavy particles and non-Gaussianity
• Blue Tensor Spectrum from Particle Production during Inflation
• Dissipative effects in the Effective Field Theory of Inflation
• A model with cosmological Bell inequalities
• Probing the Universe through the Stochastic Gravitational Wave Background
• Rolling axions during inflation: perturbativity and signatures
• Large Tensor Non-Gaussianity from Axion-Gauge Fields Dynamics
• Primordial Anisotropies in the Gravitational Wave Background from Cosmological Phase Transitions
• Science with the TianQin Observatory: Preliminary Results on Stochastic Gravitational-Wave Background
• On Loops in Inflation II: IR Effects in Single Clock Inflation
• Signals of a Quantum Universe
• Universal Constraints on Axions from Inflation
• On the validity of the perturbative description of axions during inflation
• Probing non-Gaussian Stochastic Gravitational Wave Backgrounds with LISA
• Tensor Non-Gaussianity from Axion-Gauge-Fields Dynamics : Parameter Search
• D7-Brane Moduli Space in Axion Monodromy and Fluxbrane Inflation
• Gravitational Waves from First-Order Phase Transition in a Simple Axion-Like Particle Model
• Updated Constraints and Forecasts on Primordial Tensor Modes
• A Field Range Bound for General Single-Field Inflation
• B-modes and the Nature of Inflation
• Gravitational Waves and the Scale of Inflation
• ${\varphi }^2$ or Not ${\varphi }^2$: Testing the Simplest Inflationary Potential
• Stochastic Gravitational Waves from Particle Origin
• Gravitational Waves and Scalar Perturbations from Spectator Fields
• BICEP2 implications for single-field slow-roll inflation revisited
• Multi-wavelength constraints on the inflationary consistency relation
• Primordial Gravitational Waves from Galaxy Intrinsic Alignments
• The Knotted Sky II: Does BICEP2 require a nontrivial primordial power spectrum?
• Testing Hu-Sawicki f(R) gravity with the Effective Field Theory approach
• Very Hairy Inflation
• Is there an effect of a nontrivial $c_T$ during inflation?
• How Well Can We Really Determine the Scale of Inflation?
• Large Field Inflation from Axion Mixing
• Probing The Early Universe Cosmology With NANOGrav: Possibilities and Limitations
• Stochastic Gravitational Waves from Inflaton Decays
• Inflating with Large Effective Fields
• Inflation and Alternatives with Blue Tensor Spectra
• Probing the inflationary particle content: extra spin-2 field
• Squeezed tensor non-Gaussianity in non-attractor inflation
• Feeding your Inflaton: Non-Gaussian Signatures of Interaction Structure
• Beating the Lyth bound by parametric resonance during inflation
• Gravitational waves and extra dimensions: a short review
• A new mechanism to enhance primordial tensor fluctuations in single field inflation
• On Synthetic Gravitational Waves from Multi-field Inflation
• Gaugid inflation
• Inflation After False Vacuum Decay: New Evidence from BICEP2
• Backdraft: String Creation in an Old Schwarzschild Black Hole
• Lectures on Inflation
• Double Monodromy Inflation: A Gravity Waves Factory for CMB-S4, LiteBIRD and LISA
• Inflation from Flux Cascades
• LiteBIRD Science Goals and Forecasts. A Case Study of the Origin of Primordial Gravitational Waves using Large-Scale CMB Polarization
• CMB B-mode non-Gaussianity: optimal bispectrum estimator and Fisher forecasts
• Unveiling the nonlinear dynamics of a rolling axion during inflation
• Oscillating modulation to B-mode polarization from varying propagating speed of primordial gravitational waves
• Parity Violating Non-Gaussianity from Axion-Gauge Field Dynamics
• Resonant particle production during inflation: a full analytical study
• Primordial perturbations from dilaton-induced gauge fields
• The phenomenology of trapped inflation
• The Scale of Inflation in the Landscape
• D-brane Bremsstrahlung
• Generation of gravitational waves from symmetry restoration during inflation
• Stochastic Particle Production in a de Sitter Background
• Effective Planck Mass and the Scale of Inflation
• Bogoliubov Excited States and the Lyth Bound
• Oscillation in power spectrum of primordial gravitational wave as a signature of higher-order stringy corrections
• Searching for Bispectrum of Stochastic Gravitational Waves with Pulsar Timing Arrays
• Tensor modes on the string theory landscape
• Analytic formula for the dynamics around inflation end and implications on primordial gravitational waves
• The Quantum Origin of Quasi de Sitter: a Model Independent Quantum Cosmological Tilt
• Gravitational waves during inflation from a 5D large-scale repulsive gravity model
• Synthetic Gravitational Waves from a Rolling Axion Monodromy
• Inflation in string theory confronts data/Les modèles d'inflation en théorie des cordes face aux observations
• Cosmic primordial density fluctuations and Bell inequalities
• Bigravitational inflation
• Non-Gaussianity of Inflationary Gravitational Waves from the Field Equation
• False vacuum energy dominated inflation with large $r$ and the importance of ${\kappa }_s$
• (Non-adiabatic) string creation on nice slices in Schwarzschild black holes
• Gravitational Waves from a Gauge Field Non-minimally Coupled to Gravity
• A 1+5-dimensional gravitational-wave solution: curvature singularity and spacetime singularity
• Revisiting the Chern-Simons interaction during inflation with a non-canonical pseudo-scalar
• Particle production during inflation: A Bayesian analysis with CMB data from Planck 2018