Gravity Waves and Linear Inflation from Axion Monodromy

Abstract

Wrapped branes in string compactifications introduce a monodromy that extends the field range of individual closed-string axions to beyond the Planck scale. Furthermore, approximate shift symmetries of the system naturally control corrections to the axion potential. This suggests a general mechanism for chaotic inflation driven by monodromy-extended closed-string axions. We systematically analyze this possibility and show that the mechanism is compatible with moduli stabilization and can be realized in many types of compactifications, including warped Calabi-Yau manifolds and more general Ricci-curved spaces. In this broad class of models, the potential is linear in the canonical inflaton field, predicting a tensor to scalar ratio r=0.07 accessible to upcoming cosmic microwave background (CMB) observations.

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• Non-minimally assisted chaotic inflation
• Axionic Festina Lente
• Reconciling tensor and scalar observables in G-inflation
• Resonant Reconciliation of Convex Models and the Planck
• Flux unwinding in the lattice Schwinger model
• An update on single field models of inflation in light of WMAP7
• The Power Spectrum of Density Perturbations in Chain Inflation
• Phases of Inflation
• The Trispectrum in the Effective Theory of Inflation with Galilean symmetry
• The Effect of $\alpha$-Vacua on the Scalar and Tensor Spectral Indices: Slow-Roll Approximation
• Catastrophic Inflation
• Spontaneous Baryogenesis without Baryon Isocurvature
• Reconstruction of $\alpha$-attractor supergravity models of inflation
• Small field axion inflation with sub-Planckian decay constant
• Constraint on inflation model from BICEP2 and WMAP 9-year data
• Tensor modes on the string theory landscape
• Asymmetric reheating from a symmetric inflationary potential
• Symmetry Breaking Indication for Supergravity Inflation in Light of the Planck 2015
• Anisotropies in Cosmological 21 cm Background by Oscillons/I-balls of Ultra-light Axion-like Particle
• Entanglement negativity in de Sitter biverse from Stringy Axionic Bell pair: An analysis using Bunch-Davies vacuum
• Quantum corrections to vacuum energy sequestering (with monodromy)
• Tracking Dark Energy from Axion-Gauge Field Couplings
• Holographic theories at finite $\theta$-angle, CP-violation, glueball spectra and strong-coupling instabilities
• Axion excursions of the landscape during inflation
• Modulated Inflation Models and Primordial Black Holes
• Towards an Observational Appraisal of String Cosmology
• Trans-Planckian Effects in Warm Inflation
• Dependence of the amplitude of gravitational waves from preheating on the inflationary energy scale
• The two-field regime of natural inflation
• Analytic description of monodromy oscillons
• Detectable Data-driven Features in the Primordial Scalar Power Spectrum
• Optical Lensing by Axion Stars: Observational Prospects with Radio Astrometry
• Gauge Field Production and Schwinger Reheating in Runaway Axion Inflation
• Large Field Inflation Models from Higher-Dimensional Gauge Theories
• Modified natural inflation: A small single field model with a large tensor to scalar ratio
• On the Generality and Persistence of Cosmological Stasis
• Non-Gaussianities in DBI inflation with angular motion
• Spectral Distortions from Axion Monodromy Inflation
• Squeezed gravitons from superradiant axion fields around rotating black holes
• Potential-driven Inflation with Disformal Coupling to Gravity
• Prospects for Primordial Gravitational Waves in String Inflation
• Synthetic Gravitational Waves from a Rolling Axion Monodromy
• Large Field Excursions from Dimensional (De)construction
• Refining the nonlinear modelling of primordial oscillatory features
• Inflationary Cosmology via Quantum Corrections in M-theory
• Post-inflationary structure formation boosted by parametric self-resonance
• A natural theory of dark energy
• Power spectrum oscillations from Planck-suppressed operators in effective field theory motivated monodromy inflation
• B-modes and the sound speed of primordial fluctuations
• N-flation in Supergravity
• Orbifold Line Topology and the Cosmic Microwave Background
• Quantum-Ordering Ambiguities in Weak Chern-Simons 4D Gravity and Metastability of the Condensate-Induced Inflation
• Observable Quantum Loop Effects in the Sky
• Non-Minimal M-flation
• Isotropic cosmic birefringence from an oscillating axion-like field
• Axion Monodromy Inflation, Trapping Mechanisms and the Swampland
• Reviving chaotic inflation with fermion production: a supergravity model
• Cosmic Microwave Background Dipole Asymmetry could be explained by Axion Monodromy Cosmic Strings
• Thermodynamics of the Primordial Universe
• Hitchhiker's Guide to the Swampland: The Cosmologist's Handbook to the string-theoretical Swampland Programme
• Formation of solitons and their transitions in scalar-field dark matter models with a non-polynomial self-interaction potential
• No Warm Inflation From a Vanilla Axion
• Spectral Distortion Signatures of Step-like Inflationary Potential
• Trans-Planckian Effect in $f(R)$ Cosmology
• Dimensional deformation of sine-Gordon breathers into oscillons
• Metastable vacua from torsion and machine learning
• Natural Chain Inflation
• Constraints on small-field axion inflation
• Inflation in string theory confronts data/Les modèles d'inflation en théorie des cordes face aux observations
• The IR Obstruction to UV Completion for Dante's Inferno Model with Higher-Dimensional Gauge Theory Origin
• From Stringy Particle Physics to Moduli Stabilisation and Cosmology
• On the prospects of thermalization of axion-SU(2) inflation
• Cosmological Signatures of Neutrino Seesaw Mechanism
• Connecting Inflation to the NANOGrav 15-year Data Set via Massive Gravity
• Electromagnetic coupling effects in natural inflation
• Constraints on the Sharpness of the Curvature Power Spectrum
• Analytic results in aligned axion inflation
• Lectures on Naturalness, String Landscape and Multiverse
• Cosmological Non-Gaussianity from Neutrino Seesaw Mechanism
• CMB constraints on monodromy inflation at strong coupling
• Inflating without a flat potential: Viscous inflation
• New- vs. chaotic-inflations
• GUT-scale inflation with sizeable tensor modes
• Peccei-Quinn field for inflation, baryogenesis, dark matter, and much more
• Initial conditions for small-field inflation
• Shape of the inflaton potential and the efficiency of the universe heating
• Axions in Cold Dark Matter and Inflation Models
• Multi-field inflation and the field-space metric
• Non-Gaussian and loop effects of inflationary correlation functions in BRST formalism
• Spinodal Backreaction During Inflation and Initial Conditions
• Natural Inflation on the brane with a TeV-scale gravity: Parameter constraints after Planck 2015
• Planck scale operators, inflation and fine tuning
• Tunnelling in Dante's Inferno
• The running of featureful primordial power spectra
• Open Strings and Electric Fields in Compact Spaces
• Big Bang Nucleosynthesis, the CMB, and the Origin of Matter and Space-Time
• Nonminimal Couplings and the Forgotten Field of Axion Inflation
• Gravitational Waves from a Gauge Field Non-minimally Coupled to Gravity
• Nonlinear dynamics of oscillons and transients during preheating after single field inflation
• The UV Sensitivity of Axion Monodromy Inflation
• Bunch-Davies initial conditions and non-perturbative inflationary dynamics in Numerical Relativity
• Is inflation from unwinding fluxes IIB?
• At the End of the World: Local Dynamical Cobordism
• Refitting cosmological data with neutrino mass and degeneracy
• Stringy constraints on primordial electromagnetic fields in axion inflation
• Scalar Cosmological Perturbations in M-theory with Higher Derivative Corrections
• Slow-roll corrections in multi-field inflation: a separate universes approach
• Inflationary predictions at small gamma
• Dilaton, Screening of the Cosmological Constant and IR-Driven Inflation
• Supercooled Audible Axions
• Flavored axion-monodromy inflation
• Effect of Moduli Redefinitions on Fibre Inflation
• Constant Roll Inflationary Dynamics with Generalized Potentials in $f(R,\varphi ,X)$ Gravity
• Gravitational signatures of ALP dark matter fragmentation
• More on gravitational waves from double monodromy inflation
• Inflation Story: slow-roll and beyond
• Dark energy with oscillatory tracking potential: Observational Constraints and Perturbative effects
• Brane/flux annihilation in double-throat system
• Axion Fragmentation on the Lattice
• Gravitational waves from resonant amplification of curvature perturbations during inflation
• Gravitational Waves from Gauge Quanta Produced during Inflation
• Twisting inflation to sub-Planckian axion decay constants
• Mori-Zwanzig formalism for early cosmic inflation
• A Tachyon Field around the Black Hole
• Testing an Inflation Model with Nonminimal Derivative Coupling in the Light of PLANCK 2015 Data
• Modified Power law Inflation: solution to the graceful exit problem and improvement of dark energy models
• Dynamical-System analysis of single-axion monodromy inflation with periodically-modulated potentials
• A double-running inflaton mass for a flat potential and an assisted hilltop inflation
• Circumventing Cosmic Variance via Remote Quadrupole Measurements
• Finite inflation in curved space
• The (relative) size does not matter in inflation
• Constraining the inflaton potential with gravitational waves from oscillons
• Very-High-Frequency Gravitational Waves from Multi-Monodromy Inflation
• Constraints on non-canonical chaotic inflation from ACT DR6 and BICEP/Keck data