Gravitational Wave Constraints on DBI Inflation
arXiv:0705.0240 · doi:10.1088/1475-7516/2007/07/002
Abstract
An upper bound on the amplitude of the primordial gravitational wave spectrum generated during ultra-violet DBI inflation is derived. The bound is insensitive to the form of the inflaton potential and the warp factor of the compactified dimensions and can be expressed entirely in terms of observational parameters once the volume of the five-dimensional sub-manifold of the throat has been specified. For standard type IIB compactification schemes, the bound predicts undetectably small tensor perturbations with a tensor-scalar ratio . This is incompatible with a corresponding lower limit of , which applies to any model that generates a red spectral index and a potentially detectable non-Gaussianity in the curvature perturbation. Possible ways of evading these bounds in more general DBI-type scenarios are discussed and a multiple-brane model is investigated as a specific example.
18 pages; V2: added references, version as published in JCAP
References in corpus (47)
- de Sitter Vacua in String Theory
- Non-Gaussian features of primordial fluctuations in single field inflationary models
- Hierarchies from Fluxes in String Compactifications
- Supergravity and a Confining Gauge Theory: Duality Cascades and SB-Resolution of Naked Singularities
- Dielectric-Branes
- Towards Inflation in String Theory
- Perturbations in k-inflation
- DBI in the Sky
- CFT's From Calabi-Yau Four-folds
- Observational Signatures and Non-Gaussianities of General Single Field Inflation
- Brane Inflation
- M Theory, Orientifolds and G-Flux
- What would we learn by detecting a gravitational wave signal in the cosmic microwave background anisotropy?
- Scalar Speed Limits and Cosmology: Acceleration from D-cceleration
- Flux compactifications in string theory: a comprehensive review
- Gravity Duals of Supersymmetric SU(N) x SU(N+M) Gauge Theories
- The Inflationary Brane-Antibrane Universe
- Phase Transitions In M-Theory And F-Theory
- Primordial non-gaussianities in single field inflation
- Constraints on Low-Dimensional String Compactifications
- Calabi-Yau fourfolds for M- and F-Theory compactifications
- Running Non-Gaussianities in DBI Inflation
- A Microscopic Limit on Gravitational Waves from D-brane Inflation
- Inflation from Warped Space
- Flux Stabilization of D-branes
- Multi-Throat Brane Inflation
- Closer towards inflation in string theory
- Limits on f_NL parameters from WMAP 3yr data
- Enhancing the tensor-to-scalar ratio in simple inflation
- Observing Brane Inflation
- Inflation in Realistic D-Brane Models
- Considerations in optimizing CMB polarization experiments to constrain inflationary physics
- An Inflationary Model in String Theory
- Comparing Brane Inflation to WMAP
- Stringy Effects During Inflation and Reheating
- DBI Inflation in the Tip Region of a Warped Throat
- Testing String Theory with CMB
- Warped Reheating in Multi-Throat Brane Inflation
- Heating in Brane Inflation and Hidden Dark Matter
- Multibrane Inflation and Dynamical Flattening of the Inflaton Potential
- Primordial Non-Gaussianity and Gravitational Waves: Observational Tests of Brane Inflation in String Theory
- Brane inflation and reheating
- Nonabelian Phenomena on D-branes
- Observing the Geometry of Warped Compactification via Cosmic Inflation
- Non-Abelian (p,q) Strings in the Warped Deformed Conifold
- Dielectric (p,q) Strings in a Throat
- An Observational Test of Holographic Inflation
Cited by in corpus (58)
- Planck 2013 results. XXII. Constraints on inflation
- Monodromy in the CMB: Gravity Waves and String Inflation
- Planck 2013 Results. XXIV. Constraints on primordial non-Gaussianity
- String Cosmology: A Review
- Primordial non-Gaussianity from the DBI Galileons
- Route to nonlocal cosmology
- Phenomenology of D-Brane Inflation with General Speed of Sound
- Spinflation
- Planck constraints on single-field inflation
- Non-gaussianity from the bispectrum in general multiple field inflation
- String Inflation After Planck 2013
- Comparing Infrared Dirac-Born-Infeld Brane Inflation to Observations
- The non-adiabatic pressure in general scalar field systems
- Large slow-roll corrections to the bispectrum of noncanonical inflation
- On the full trispectrum in single field DBI-inflation
- Multifield DBI Inflation and Non-Gaussianities
- Inflation in Entropic Cosmology: Primordial Perturbations and non-Gaussianities
- DBI Realizations of the Pseudo-Conformal Universe and Galilean Genesis Scenarios
- Primordial fluctuations and non-Gaussianities from multifield DBI Galileon inflation
- Inflation from Wrapped Branes
- A Field Range Bound for General Single-Field Inflation
- On the full quantum trispectrum in multi-field DBI inflation
- Multi-field DBI inflation: introducing bulk forms and revisiting the gravitational wave constraints
- Quantum modes in DBI inflation: exact solutions and constraints from vacuum selection
- Warm DBI Inflation
- Lorentz boost and non-Gaussianity in multi-field DBI-inflation
- Combined local and equilateral non-Gaussianities from multifield DBI inflation
- Generalised DBI-Quintessence
- Tachyacoustic Cosmology: An Alternative to Inflation
- Non-Gaussianity in single field models without slow-roll
- Cosmological Dynamics of a Dirac-Born-Infeld field
- Supersymmetric DBI inflation
- Non-canonical generalizations of slow-roll inflation models
- Gravitational quantum effects on power spectra and spectral indices with higher-order corrections
- Large Gravitational Waves and Lyth Bound in Multi Brane Inflation
- Statistical Anisotropy from Vector Curvaton in D-brane Inflation
- DBI N-flation
- Quintessence and phantom dark energy from ghost D-branes
- Single-Field Inflation After WMAP5
- Gravitational Wave Constraints on Multi-Brane Inflation
- Detectable primordial non-gaussianities and gravitational waves in k-inflation
- Warped Wilson Line DBI Inflation
- DBI Inflation in N=1 Supergravity
- Enhanced Inflation in the Dirac-Born-Infeld framework
- Inflation in DBI models with constant gamma
- Dynamics of Dirac-Born-Infeld dark energy interacting with dark matter
- Rotating a Curvaton Brane in a Warped Throat
- Dirac-Born-Infeld warm inflation realization in the strong dissipation regime
- Spectator field models in light of spectral index after Planck
- Non-Gaussianities in multi-field DBI inflation with a waterfall phase transition
- Reconstructing Single Field Inflationary Actions From CMBR Data
- Brane Bremsstrahlung in DBI Inflation
- Inflation with exotic kinetic terms in Einstein-Chern-Simons gravity
- Towards an Observational Appraisal of String Cosmology
- Non-Gaussianities in DBI inflation with angular motion
- Bounds on Tensor wave and Twisted Inflation
- Non-relativistic Matrix Inflation
- Consistency relation for the Lorentz invariant single-field inflation