Squeezed tensor non-Gaussianity in non-attractor inflation

Abstract

We investigate primordial tensor non-Gaussianity in single field inflation, during a phase of non-attractor evolution when the spectrum of primordial tensor modes can be enhanced to a level detectable at interferometer scales. Making use of a tensor duality we introduced in arXiv:1808.10475, we analytically compute the full bispectrum of primordial tensor fluctuations during the non-attractor era. During this epoch the shape of the tensor bispectrum is enhanced in the squeezed limit, its amplitude can be amplified with respect to slow-roll models, and tensor non-Gaussianity can exhibit a scale dependence distinctive of our set-up. We prove that our results do not depend on the frame used for the calculations. Squeezed tensor non-Gaussianity induces a characteristic quadrupolar anisotropy on the power spectrum of the stochastic background of primordial tensor perturbations. As a step to make contact with gravitational wave experiments, we discuss the response function of a ground based Michelson interferometer to a gravitational wave background with such a feature.

arXiv comment34 pages, 4 figures

References in corpus (114)

• Non-Gaussian features of primordial fluctuations in single field inflationary models
• Generalized G-inflation: Inflation with the most general second-order field equations
• Primordial Black Holes as Dark Matter
• Gravitational Wave Experiments and Early Universe Cosmology
• Quantum Contributions to Cosmological Correlations
• The Pre-Big Bang Scenario in String Cosmology
• Primordial Black Holes - Perspectives in Gravitational Wave Astronomy -
• Healthy theories beyond Horndeski
• Degenerate higher derivative theories beyond Horndeski: evading the Ostrogradski instability
• Transforming gravity: from derivative couplings to matter to second-order scalar-tensor theories beyond the Horndeski Lagrangian
• Primordial black holes from single field models of inflation
• G-inflation: inflation driven by the Galileon field
• The shape of non-Gaussianities
• On graviton non-Gaussianities during inflation
• Science with the space-based interferometer LISA. IV: Probing inflation with gravitational waves
• Degenerate higher order scalar-tensor theories beyond Horndeski up to cubic order
• Extended Scalar-Tensor Theories of Gravity
• On the Generation of a Scale-Invariant Spectrum of Adiabatic Fluctuations in Cosmological Models with a Contracting Phase
• Horizon crossing and inflation with large η
• A Cosmological Signature of the SM Higgs Instability: Gravitational Waves
• Duality Invariance of Cosmological Perturbation Spectra
• Primordial black hole dark matter from single field inflation
• Ultra Slow-Roll Inflation and the non-Gaussianity Consistency Relation
• Large Nongaussianity in Axion Inflation
• Primordial Black Holes and Slow-Roll Violation
• Particle production during inflation and gravitational waves detectable by ground-based interferometers
• Primordial Black Hole production in Critical Higgs Inflation
• Violation of non-Gaussianity consistency relation in a single field inflationary model
• Parity violation in the Cosmic Microwave Background from a pseudoscalar inflaton
• Galileon inflation
• Solid Inflation
• Gravitational Wave signatures of inflationary models from Primordial Black Hole Dark Matter
• Inflation with a constant rate of roll
• The Primordial Black Hole Dark Matter - LISA Serendipity
• Direct detection of the inflationary gravitational wave background
• Running Non-Gaussianities in DBI Inflation
• Testing Primordial Black Holes as Dark Matter through LISA
• Gravity waves and non-Gaussian features from particle production in a sector gravitationally coupled to the inflaton
• Semiclassical relations and IR effects in de Sitter and slow-roll space-times
• Gauge Fields and Inflation: Chiral Gravitational Waves, Fluctuations and the Lyth Bound
• Primordial Gravitational Waves from Axion-Gauge Fields Dynamics
• Non-Gaussianities and chiral gravitational waves in natural steep inflation
• Massive Primordial Black Holes as Dark Matter and their detection with Gravitational Waves
• Primordial Black Holes from Inflation and Quantum Diffusion
• Perturbations in Chromo-Natural Inflation
• Detection of Anisotropies in the Gravitational-Wave Stochastic Background
• Cosmological perturbations through a simple bounce
• Stability analysis of chromo-natural inflation and possible evasion of Lyth's bound
• Ultra slow-roll inflation demystified
• A Single Field Inflation Model with Large Local Non-Gaussianity
• Mechanisms for Primordial Black Hole Production in String Theory
• Resilience of the standard predictions for primordial tensor modes
• Fast-Roll Inflation
• Scale-dependent non-Gaussianity probes inflationary physics
• Rapidly-Varying Speed of Sound, Scale Invariance and Non-Gaussian Signatures
• Primordial Black Holes from String Inflation
• Single-field inflation, anomalous enhancement of superhorizon fluctuations, and non-Gaussianity in primordial black hole formation
• Finding the chiral gravitational wave background of an axion-SU(2) inflationary model using CMB observations and laser interferometers
• Scale dependence of local f_NL
• Parity Violation in Graviton Non-gaussianity
• Axion Inflation with an SU(2) Gauge Field: Detectable Chiral Gravity Waves
• New Sources of Gravitational Waves during Inflation
• An inflationary model with small scalar and large tensor nongaussianities
• Parity breaking signatures from a Chern-Simons coupling during inflation: the case of non-Gaussian gravitational waves
• Axion Gauge Field Inflation and Gravitational Leptogenesis: A Lower Bound on B Modes from the Matter-Antimatter Asymmetry of the Universe
• Large Tensor Non-Gaussianity from Axion-Gauge Fields Dynamics
• Curvature perturbation at the local extremum of the inflaton's potential
• Conditions for Generating Scale-Invariant Density Perturbations
• Primordial non-Gaussianities of gravitational waves in the most general single-field inflation model
• Enhancing Inflationary Tensor Modes through Spectator Fields
• In-in and $\delta N$ calculations of the bispectrum from non-attractor single-field inflation
• Effects of parity violation on non-gaussianity of primordial gravitational waves in Hořava-Lifshitz gravity
• Cosmological disformal invariance
• On the constant-roll inflation
• The attractive behaviour of ultra-slow-roll inflation
• Inflationary tensor fossils in large-scale structure
• Primordial gravitational waves in supersolid inflation
• Probing non-Gaussian Stochastic Gravitational Wave Backgrounds with LISA
• Distinctive signatures of space-time diffeomorphism breaking in EFT of inflation
• Anisotropic imprint of long-wavelength tensor perturbations on cosmic structure
• Tensor Non-Gaussianity from Axion-Gauge-Fields Dynamics : Parameter Search
• Inflationary Correlation Functions without Infrared Divergences
• Parity Violation of Gravitons in the CMB Bispectrum
• Generalised tensor fluctuations and inflation
• A new duality relating density perturbations in expanding and contracting Friedmann cosmologies
• Soft Theorems For Shift-Symmetric Cosmologies
• A generalized non-Gaussian consistency relation for single field inflation
• Tensor Squeezed Limits and the Higuchi Bound
• High-Scale Inflation and the Tensor Tilt
• Gravitational Waves and Scalar Perturbations from Spectator Fields
• Higgsed Gauge-flation
• Blue-tilted Primordial Gravitational Waves from Massive Gravity
• Breaking discrete symmetries in the effective field theory of inflation
• Ultra slow-roll G-inflation
• Rapid field excursions and the inflationary tensor spectrum
• Towards a Cosmological Dual to Inflation
• CMB Scale Dependent Non-Gaussianity from Massive Gravity during Inflation
• Clustering Fossils in Solid Inflation
• On Dualities Of Primordial Perturbation Spectra
• Probing the inflationary particle content: extra spin-2 field
• Cosmological Shapes of Higher-Spin Gravity
• Disformal invariance of curvature perturbation
• Anisotropic tensor power spectrum at interferometer scales induced by tensor squeezed non-Gaussianity
• Massive and modified gravity as self-gravitating media
• On Synthetic Gravitational Waves from Multi-field Inflation
• A new mechanism to enhance primordial tensor fluctuations in single field inflation
• Tensor non-Gaussianities from Non-minimal Coupling to the Inflaton
• Vanishing of local non-Gaussianity in canonical single field inflation
• Large Local Non-Gaussianity from General Single-field Inflation
• Effective Field Theory of Broken Spatial Diffeomorphisms
• Primordial Non-Gaussianity of Gravitational Waves in Hořava-Lifshitz Gravity
• Possible Signatures of Inflationary Particle Content: Spin-2 Fields
• Generation of gravitational waves from symmetry restoration during inflation
• CMB B-mode auto-bispectrum produced by primordial gravitational waves

Cited by in corpus (21)

• Probing Anisotropies of the Stochastic Gravitational Wave Background with LISA
• On the slope of curvature power spectrum in non-attractor inflation
• Primordial black holes as dark matter and gravitational waves from bumpy axion inflation
• An analytic approach to non-slow-roll inflation
• Primordial Gravitational Waves from Galaxy Intrinsic Alignments
• Searching for Fossil Fields in the Gravity Sector
• Tensor non-Gaussianity in chiral scalar-tensor theories of gravity
• Testing the Early Universe with Anisotropies of the Gravitational Wave Background
• Enhancing gravitational wave anisotropies with peaked scalar sources
• Generation of Primordial Black Holes and Gravitational Waves from Dilaton-Gauge Field Dynamics
• Primordial tensor non-Gaussianities from general single-field inflation with non-Bunch-Davies initial states
• Primordial non-Gaussianities of scalar and tensor perturbations in general bounce cosmology: Evading the no-go theorem
• Probing a stationary non-Gaussian background of stochastic gravitational waves with pulsar timing arrays
• Parity Violating Non-Gaussianity from Axion-Gauge Field Dynamics
• Small-scale Tests of Inflation
• CMB $\mu T$ cross-correlations as a probe of PBH scenarios
• Probing parity-odd bispectra with anisotropies of GW $V$ modes
• Primordial tensor bispectra in $\mu$-CMB cross-correlations
• Primordial Tensor Non-Gaussianity from Massive Gravity
• Stochastic approach to gravitational waves from inflation
• Tensor bispectrum mediated by an excited scalar field during inflation