Multiple Inflation, Cosmic String Networks and the String Landscape

Abstract

Motivated by the string landscape we examine scenarios for which inflation is a two-step process, with a comparatively short inflationary epoch near the string scale and a longer period at a much lower energy (like the TeV scale). We quantify the number of $e$-foldings of inflation which are required to yield successful inflation within this picture. The constraints are very sensitive to the equation of state during the epoch between the two inflationary periods, as the extra-horizon modes can come back inside the horizon and become reprocessed. We find that the number of $e$-foldings during the first inflationary epoch can be as small as 12, but only if the inter-inflationary period is dominated by a network of cosmic strings (such as might be produced if the initial inflationary period is due to the brane-antibrane mechanism). In this case a further 20 $e$-foldings of inflation would be required at lower energies to solve the late universe's flatness and horizon problems.

27 pages, 6 figures; v2: refences added

References in corpus (68)

• de Sitter Vacua in String Theory
• Hierarchies from Fluxes in String Compactifications
• Towards Inflation in String Theory
• DBI in the Sky
• Brane Inflation
• M Theory, Orientifolds and G-Flux
• Density Perturbations and Black Hole Formation in Hybrid Inflation
• A more accurate analytic calculation of the spectrum of cosmological perturbations produced during inflation
• Cosmic String Production Towards the End of Brane Inflation
• How long before the end of inflation were observable perturbations produced?
• Model Independent Properties and Cosmological Implications of the Dilaton and Moduli Sectors of 4-d Strings
• Cosmic F- and D-strings
• The Inflationary Brane-Antibrane Universe
• Cosmological Implications of Dynamical Supersymmetry Breaking
• Thermal Inflation and the Moduli Problem
• Constraints on Low-Dimensional String Compactifications
• Formation and evolution of cosmic D-strings
• Lectures on string/brane cosmology
• Inflation and Eternal Inflation
• Assisted inflation via tachyon condensation
• Racetrack Inflation
• D3/D7 Inflationary Model and M-theory
• Inflation from D-\bar{D} brane annihilation
• Brane Interaction as the Origin of Inflation
• Loop Corrections to Volume Moduli and Inflation in String Theory
• Inflationary Scenarios from Branes at Angles
• The Scaling of the No Scale Potential and de Sitter Model Building
• Multiple inflation
• Multi-Throat Brane Inflation
• Closer towards inflation in string theory
• String Theory and Hybrid Inflation/Acceleration
• D3/D7 Brane Inflation and Semilocal Strings
• Stationary Universe
• On Brane Inflation With Volume Stabilization
• The Giant Inflaton
• Brane-Antibrane Inflation in Orbifold and Orientifold Models
• Inflation in Realistic D-Brane Models
• D-term strings
• De Sitter Vacua from Heterotic M-Theory
• General Brane Geometries from Scalar Potentials: Gauged Supergravities and Accelerating Universes
• Inflation from Superstring/M Theory Compactification with Higher Order Corrections I
• An Inflationary Model in String Theory
• Inflation from M-Theory with Fourth-order Corrections and Large Extra Dimensions
• Accelerating Cosmologies and Inflation from M/Superstring Theories
• Saltatory de Sitter String Vacua
• Making Predictions in Eternally Inflating Universe
• Recombination of Intersecting D-Branes and Cosmological Inflation
• Volume Stabilization and the Origin of the Inflaton Shift Symmetry in String Theory
• Supergravity Analysis of Hybrid Inflation Model from D3--D7 System
• Stability of D1-Strings Inside a D3-Brane
• Overproduction of cosmic superstrings
• Testing for double inflation with WMAP
• Inflation in warped geometries
• Accelerated expansion and the Goldstone ghost
• Dynamics of a large extra dimension inspired hybrid inflation model
• Formation of Topological Defects at First Order Phase Transitions
• Natural Double Inflation in Supergravity
• Braneworld inflation
• Double Inflation in Supergravity and the Large Scale Structure
• Two-Stage Inflation in Supergravity
• Double inflation in supergravity and the primordial black hole formation
• Old Inflation in String Theory
• Cosmic Strings in an Open Universe: Quantitative Evolution and Observational Consequences
• Density Fluctuations and Primordial Black Hole Formation in Natural Double Inflation in Supergravity
• Formation of Topological Defects in a Second Order Phase Transition
• D-Brane Inflation on Conifolds
• Folded Inflation, Primordial Tensors, and the Running of the Scalar Spectral Index
• Low scale inflation with large number of e-foldings

Cited by in corpus (81)

• Planck 2013 results. XXII. Constraints on inflation
• String Cosmology: A Review
• Particle physics models of inflation and curvaton scenarios
• Magnetically charged black holes from non-linear electrodynamics and the Event Horizon Telescope
• Gauge invariant MSSM inflaton
• Fibre Inflation: Observable Gravity Waves from IIB String Compactifications
• MSSM flat direction inflation: slow roll, stability, fine tunning and reheating
• Features and New Physical Scales in Primordial Observables: Theory and Observation
• Cosmic phase transitions: their applications and experimental signatures
• Inflation and the Scale Dependent Spectral Index: Prospects and Strategies
• Anisotropic Dark Energy: Dynamics of Background and Perturbations
• Primordial seeds of supermassive black holes
• M-Theory Inflation from Multi M5-Brane Dynamics
• Bayesian Analysis of Inflation II: Model Selection and Constraints on Reheating
• CMB polarization features from inflation versus reionization
• Astrophysical and Cosmological Implications of Large Volume String Compactifications
• Inflation from N-Forms and its stability
• Bayesian Analysis of Inflation: Parameter Estimation for Single Field Models
• Spinflation
• String Inflation After Planck 2013
• Do we have any hope of detecting scattering between dark energy and baryons through cosmology?
• A-term inflation and the smallness of the neutrino masses
• Cosmology From Random Multifield Potentials
• Unifying inflation and dark matter with neutrino masses
• Energy Transfer in Multi Field Inflation and Cosmological Perturbations
• Slow Roll Reconstruction: Constraints on Inflation from the 3 Year WMAP Dataset
• Implications of a Running Spectral Index for Slow Roll Inflation
• Low & High scale MSSM inflation, gravitational waves and constraints from Planck
• Cosmology of the selfaccelerating third order Galileon
• Primordial Black Holes, Eternal Inflation, and the Inflationary Parameter Space after WMAP5
• Features of the inflaton potential and the power spectrum of cosmological perturbations
• Inflection point inflation within supersymmetry
• Attraction towards an inflection point inflation
• Hybrid Inflation in the Complex Plane
• The Lyth Bound and the End of Inflation
• Intermittent null energy condition violations during inflation and primordial gravitational waves
• Accuracy of slow-roll formulae for inflationary perturbations: implications for primordial black hole formation
• Primordial perturbations and non-Gaussianities from modulated trapping
• Can Effective Field Theory of inflation generate large tensor-to-scalar ratio within Randall Sundrum single braneworld?
• Bayesian inflationary reconstructions from Planck 2018 data
• Constraining $\mathcal{N}=1$ supergravity inflationary framework with non-minimal Kähler operators
• Inflation, baryogenesis and gravitino dark matter at ultra low reheat temperatures
• Probing the parameter space for an MSSM inflation and the neutralino dark matter
• Non-Gaussianity in single field models without slow-roll
• Trans-Planckian censorship of multistage inflation and dark energy
• Probing Unified Origin of Dark Matter and Baryon Asymmetry at PAMELA/Fermi
• Inflection point inflation: WMAP constraints and a solution to the fine-tuning problem
• Nuclear Fusion Inside Dark Matter
• Graceful exit from a stringy landscape via MSSM inflation
• The inflating curvaton
• Constraining Inflation
• Rollercoaster Cosmology
• Reconstructing inflationary paradigm within Effective Field Theory framework
• Cosmological constraints on string scale and coupling arising from tachyonic instability
• Constraints on Neutrino Mass and Light Degrees of Freedom in Extended Cosmological Parameter Spaces
• Separable and non-separable multi-field inflation and large non-Gaussianity
• Tuned MSSM Higgses as an inflaton
• Visible sector inflation and the right thermal history in light of Planck data
• Cyclic Inflation
• The Hubble Slow Roll Expansion for Multi Field Inflation
• Inflationary predictions in scalar-tensor DBI inflation
• Hayward black hole in scalar-Einstein-Gauss-Bonnet gravity in four dimensions
• Cycloops: Dark Matter or a Monopole Problem for Brane Inflation?
• Inflation in a Web
• Inflation with large supergravity corrections
• Reducing the spectral index in F-term hybrid inflation through a complementary modular inflation
• Non-Standard Cosmological Models and the trans-Planckian Censorship Conjecture
• $f(R)$-Gravity Generated Post-inflationary Eras and their Effect on Primordial Gravitational Waves
• Inflation from String Theory
• Gravitational Waves From Dark Sectors, Oscillating Inflatons, and Mass Boosted Dark Matter
• Clearing the Brush: The Last Stand of Solo Small Field Inflation
• Embedding DBI inflation in scalar-tensor theory
• Logolinear series expansions with applications to primordial cosmology
• Eliminating infrared divergences in an inflationary cosmology
• New developments on embedding inflation in gauge theory and particle physics
• Noncommutative Universe and Chameleon Field Dynamics
• Supermassive gravitinos, dark matter, leptogenesis and flat direction baryogenesis
• "Old" Locked Inflation
• Breathing Comoving Hubble: Initial Condition and Eternity in view of the trans-Planckian Censorship Conjecture
• Suppression of the large scale curvature perturbation by interacting fluids
• Very-High-Frequency Gravitational Waves from Multi-Monodromy Inflation