Pre-Big-Bang in String Cosmology

Abstract

The duality-type symmetries of string cosmology naturally lead to a pre-big-bang phase of accelerated evolution as dual counterpart of the decelerated expansion of standard cosmology. We discuss several properties of this scenario, including the possibility that tracks of the pre-big-bang may be found either in the spectrum of relic gravitons or in the distortion they induce on the cosmic microwave background.

36 pages (plus 1 table and 3 figures ava. upon request), CERN-TH.6572

References in corpus (10)

• Elements of String Cosmology
• Duality and Dilaton
• Twisting Classical Solutions in Heterotic String Theory
• $O(d,d)$-Covariant String Cosmology
• Manifestly $O(d,d)$ Invariant Approach to Space-Time Dependent String Vacua
• Dilaton Contributions to the Cosmic Gravitational Wave Background
• Dilaton, winding modes and cosmological solutions
• The gravitational wave contribution to CMB anisotropies and the amplitude of mass fluctuations from COBE results
• Boosting Away Singularities from Conformal String Backgrounds
• On Cosmological String Backgrounds with Toroidal Isometries

Cited by in corpus (710)

• Planck 2013 results. XVI. Cosmological parameters
• Modified Gravity and Cosmology
• f(R) theories
• Planck 2018 results. X. Constraints on inflation
• k-Inflation
• The Ekpyrotic Universe: Colliding Branes and the Origin of the Hot Big Bang
• f(T) teleparallel gravity and cosmology
• Generating the curvature perturbation without an inflaton
• First Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Implications for Inflation
• Planck 2013 results. XXII. Constraints on inflation
• Inflation Dynamics and Reheating
• Cosmology and Fundamental Physics with the Euclid Satellite
• Target Space Duality in String Theory
• Cosmological Backgrounds of Gravitational Waves
• Cosmology and fundamental physics with the Euclid satellite
• The Pre-Big Bang Scenario in String Cosmology
• Adiabatic CMB perturbations in pre-big bang string cosmology
• Reconstructing the Inflaton Potential --- an Overview
• Cosmic Evolution in a Cyclic Universe
• The Trans-Planckian Problem of Inflationary Cosmology
• From Big Crunch to Big Bang
• Beyond $\Lambda$CDM: Problems, solutions, and the road ahead
• Inflationary Cosmology
• Superstring Cosmology
• Matter Bounce Cosmology with the f(T) Gravity
• Singularity-free cosmological solutions of the superstring effective action
• Scalar-tensor gravity in an accelerating universe
• On the Generation of a Scale-Invariant Spectrum of Adiabatic Fluctuations in Cosmological Models with a Contracting Phase
• Bouncing Cosmologies: Progress and Problems
• Updated Nucleosynthesis Constraints on Unstable Relic Particles
• Oscillating Quintom and the Recurrent Universe
• Construction of cosmologically viable f(G) gravity models
• Duality Invariance of Cosmological Perturbation Spectra
• Cosmology with the Laser Interferometer Space Antenna
• Particle physics models of inflation and curvaton scenarios
• Power-Law Inflation from the Rolling Tachyon
• Lectures on string/brane cosmology
• Primordial Magnetic Fields From String Cosmology
• Upper Limits on the Stochastic Gravitational-Wave Background from Advanced LIGO's First Observing Run
• Stochastic Gravitational Wave Backgrounds
• Supergravity Domain Walls
• Trans-Planckian Censorship and the Swampland
• G-Bounce
• Bouncing Universe with Quintom Matter
• The astrophysical gravitational wave stochastic background
• Towards a non-singular pre-big bang cosmology
• Relic Gravitational Waves from String Cosmology
• The Graceful Exit Problem in String Cosmology
• Stochastic Gravitational Wave Production After Inflation
• Cosmology With Negative Potentials
• Trans-Planckian Censorship and Inflationary Cosmology
• Dark energy in Horndeski theories after GW170817: A review
• A Cosmological Theory without Singularities
• Dilaton Production in String Cosmology
• Exploring Bouncing Cosmologies with Cosmological Surveys
• Towards a Resolution of the Cosmological Singularity in Non-local Higher Derivative Theories of Gravity
• A Nonsingular Cosmology with a Scale-Invariant Spectrum of Cosmological Perturbations from Lee-Wick Theory
• Chaos in Superstring Cosmology
• Superquintessence
• On the Construction of Nonsingular Pre-Big-Bang and Ekpyrotic Cosmologies and the Resulting Density Perturbations
• Bouncing Galileon Cosmologies
• The Classical Universes of the No-Boundary Quantum State
• Low energy effective string cosmology
• Suppressing CMB Quadrupole with a Bounce from Contracting Phase to Inflation
• Adiabatic and Isocurvature Perturbations for Multifield Generalized Einstein Models
• A Model of Graceful Exit in String Cosmology
• Primordial perturbations in a non singular bouncing universe model
• Digging deeper: Observing primordial gravitational waves below the binary black hole produced stochastic background
• Modular Cosmology
• Gravitational Wave Astronomy: in Anticipation of First Sources to be Detected
• Singularity-free cosmological solutions in quadratic gravity
• Cosmological perturbations through a simple bounce
• Towards a Big Crunch Dual
• Solar system constraints on f(G) gravity models
• Holographic Description of AdS Cosmologies
• From Big Bang to Big Crunch and Beyond
• String Theory and Inflation
• Phantom Inflation and Primordial Perturbation Spectrum
• Induced gravitational wave background and primordial black holes
• Exploring Cosmic Origins with CORE: Inflation
• Metric Perturbations in Dilaton-Driven Inflation
• Searching for a Stochastic Background of Gravitational Waves with LIGO
• Identification and mitigation of narrow spectral artifacts that degrade searches for persistent gravitational waves in the first two observing runs of Advanced LIGO
• Non-singular cosmology in a model of non-relativistic gravity
• Vacuum fluctuations in axion-dilaton cosmologies
• One-Loop Superstring Cosmology and the Non-Singular Universe
• Obtaining the CMB anomalies with a bounce from the contracting phase to inflation
• Rapidly-Varying Speed of Sound, Scale Invariance and Non-Gaussian Signatures
• On Perturbations of Quintom Bounce
• Tree-level String Cosmology
• Nearly Scale-Invariant Spectrum of Adiabatic Fluctuations May be from a Very Slowly Expanding Phase of the Universe
• Graceful exit in quantum string cosmology
• The Matter Bounce Curvaton Scenario
• Cosmological Solutions in String Theories
• On the Realization of Assisted Inflation
• String and M-Theory Cosmological Solutions with Ramond Forms
• Topological Defects as Seeds for Eternal Inflation
• Density perturbations in generalized Einstein scenarios and constraints on nonminimal couplings from the Cosmic Microwave Background
• Boundary Inflation
• Evolution of cosmological perturbations in non-singular string cosmologies
• Primordial non-Gaussianities in general modified gravitational models of inflation
• Conformal-Frame (In)dependence of Cosmological Observations in Scalar-Tensor Theory
• Bouncing Cosmology made simple
• Dilaton Contributions to the Cosmic Gravitational Wave Background
• Spectrum of relic gravitational waves in string cosmology
• The Generalized Second Law of Thermodynamics in Cosmology
• Inflation from Superstring/M Theory Compactification with Higher Order Corrections I
• Passing through the bounce in the ekpyrotic models
• Non-Commutative Inflation
• A Problem with Non-Abelian Duality
• Solving the Flatness and Quasi-flatness Problems in Brans-Dicke Cosmologies with a Varying Light Speed
• Phantom k-essence cosmologies
• An Inflationary Model in String Theory
• Initial Conditions for Inflation - A Short Review
• Bounce inflation in $f(T)$ Cosmology: A unified inflaton-quintessence field
• Perturbations in a non-singular bouncing Universe
• String Inflation After Planck 2013
• A non inflationary model with scale invariant cosmological perturbations
• Cosmological Solutions of Type II String Theory
• Parametric amplification of metric fluctuations through a bouncing phase
• Detection of Early-Universe Gravitational Wave Signatures and Fundamental Physics
• Assisted Contraction
• Correlated magnetic noise in global networks of gravitational-wave interferometers: observations and implications
• The Science of the Einstein Telescope
• Vainshtein mechanism in second-order scalar-tensor theories
• Gravity-wave interferometers as probes of a low-energy effective quantum gravity
• Measurement of Parity Violation in the Early Universe using Gravitational-wave Detectors
• Cosmology of the Very Early Universe
• Bouncing cosmological solutions from f(R,T) gravity
• Evolution of Metric Perturbations in Quintom Bounce model
• Harrison--Zeldovich spectrum from conformal invariance
• Slow-roll parameters in braneworld cosmologies
• Possible Explanation to Low CMB Quadrupole
• Scalar and Vector Perturbations in Quantum Cosmological Backgrounds
• The Matter Bounce Alternative to Inflationary Cosmology
• String Cosmology with a Time-Dependent Antisymmetric Tensor Potential
• Lectures on Cosmic Inflation and its Potential Stringy Realizations
• A Model Of Inflationary Cosmology Without Singularity
• Graceful Exit and Energy Conditions in String Cosmology
• Recovering the Inflationary Potential and Primordial Power Spectrum With a Slow Roll Prior: Methodology and Application to WMAP 3 Year Data
• Generalized Brans-Dicke theories
• Inhomogeneous Pre-Big Bang String Cosmology
• On the Quantum Resolution of Cosmological Singularities using AdS/CFT
• Supersymmetric Galileons
• Dynamics in Nonlocal Cosmological Models Derived from String Field Theory
• Subtracting compact binary foreground sources to reveal primordial gravitational-wave backgrounds
• Supersymmetric P(X,phi) and the Ghost Condensate
• Reconstruction of general scalar-field dark energy models
• Populating the Landscape: A Top Down Approach
• Loop corrections and graceful exit in string cosmology
• Parameter Estimation in Searches for the Stochastic Gravitational-Wave Background
• Preheating a bouncing universe
• Correlated noise in networks of gravitational-wave detectors: subtraction and mitigation
• A Galileon Design of Slow Expansion
• DBI Realizations of the Pseudo-Conformal Universe and Galilean Genesis Scenarios
• Godel Universes in String Theory
• Repulsive gravity in the very early Universe
• Holographic Principle and String Cosmology
• A Nonsingular Two Dimensional Black Hole
• Peak and end point of the relic graviton background in string cosmology
• The Pseudo-Conformal Universe: Scale Invariance from Spontaneous Breaking of Conformal Symmetry
• Quantum Fields in a Big Crunch/Big Bang Spacetime
• Pre-Big-Bang Inflation Requires Fine Tuning
• Ekpyrotic collapse with multiple fields
• DBI Genesis: An Improved Violation of the Null Energy Condition
• Axions and the Graceful Exit Problem in String Cosmology
• Squeezed Thermal Vacuum and the Maximum Scale for Inflation
• Quantum Squeezing and Cosmological Entropy Production
• Back Reaction and Graceful Exit in String Inflationary Cosmology
• Aspects of String-Gas Cosmology at Finite Temperature
• On the validity of the perturbative description of axions during inflation
• Cosmological perturbations across a curvature bounce
• Matter instabilities in general Gauss-Bonnet gravity
• Density perturbations in the Ekpyrotic Universe and string-inspired generalizations
• Boson Stars as Gravitational Lenses
• Pre-big bang bubbles from the gravitational instability of generic string vacua
• DHOST Bounce
• CMB Imprints of a Pre-Inflationary Climbing Phase
• Magnetic Fields from Phase Transitions
• Entropy Production in the Cosmological Amplification of the Vacuum Fluctuations
• Kantowski-Sachs String Cosmologies
• Cosmological Scaling Solutions and Multiple Exponential Potentials
• Bouncing Brane Cosmologies from Warped String Compactifications
• Isotropization in Brane Gas Cosmology
• Scale Factor Duality and Hidden Supersymmetry in Scalar--Tensor Cosmology
• Improved limits on short-wavelength gravitational waves from the cosmic microwave background
• Tensor perturbations in high-curvature string backgrounds
• Big Bounce Genesis
• Cosmic microwave background polarization, Faraday rotation and stochastic gravity-waves backgrounds
• Nonperturbative analysis of the evolution of cosmological perturbations through a nonsingular bounce
• Challenges for String Cosmology
• Closed String Thermodynamics and a Blue Tensor Spectrum
• Naked singularities in dilatonic domain wall space-times
• S-duality Invariant Perturbations in String Cosmology
• Trans-Planckian Physics and the Spectrum of Fluctuations in a Bouncing Universe
• Non-linear Realizations of Conformal Symmetry and Effective Field Theory for the Pseudo-Conformal Universe
• Warm brane inflation with an exponential potential: A consistent realization away from the swampland
• Screening the fifth force in the Horndeski's most general scalar-tensor theories
• Defrosting in an Emergent Galileon Cosmology
• A Mock Data and Science Challenge for Detecting an Astrophysical Stochastic Gravitational-Wave Background with Advanced LIGO and Advanced Virgo
• Note on the production of scale-invariant entropy perturbation in the Ekpyrotic universe
• Inhomogeneous String Cosmologies
• Topological $R^4$ Inflation
• Inflation and Brane Gases
• Dynamical analysis on $f(R,\mathcal{G})$ cosmology
• The effective field theory of inflation/dark energy and the Horndeski theory
• Inflation in string-inspired cosmology and suppression of CMB low multipoles
• Vacuum Choices and the Predictions of Inflation
• Cyclic cosmology from Lagrange-multiplier modified gravity
• Non-standard primordial fluctuations and nongaussianity in string inflation
• On compatibility of string effective action with an accelerating universe
• Exact Supersymmetric String Solutions in Curved Gravitational Backgrounds
• Shift Symmetry and Inflation in Supergravity
• Pre-Big-Bang Requires the Universe to be Exponentially Large From the Very Beginning
• When can preheating affect the CMB?
• More on the Spectrum of Perturbations in String Gas Cosmology
• Quantum Anomalies in String-Inspired Running Vacuum Universe: Inflation and Axion Dark Matter
• Birth of the Universe as quantum scattering in string cosmology
• Dilaton Cosmology, Noncommutativity and Generalized Uncertainty Principle
• Phase-plane analysis of Friedmann-Robertson-Walker cosmologies in Brans-Dicke gravity
• String Kaluza-Klein cosmologies with RR-fields
• Curvatons in Supersymmetric Models
• Thermal duality and non-singular cosmology in d-dimensional superstrings
• Singularities In Scalar-Tensor Cosmologies
• From Satisfying to Violating the Null Energy Condition
• Lectures on string theory and cosmology
• Inflationary physics and transplanckian conjecture in the Stringy Running-Vacuum-Model: from the phantom vacuum to the true vacuum
• Big Bang Models in String Theory
• Dynamics of a scalar field in Robertson-Walker spacetimes
• Seeds of large-scale anisotropy in string cosmology
• Classical Inhomogeneities in String Cosmology
• Bianchi Type I Cosmologies in Arbitrary Dimensional Dilaton Gravities
• First Cross-Correlation Analysis of Interferometric and Resonant-Bar Gravitational-Wave Data for Stochastic Backgrounds
• Could thermal fluctuations seed cosmic structure?
• Relaxation of the cosmological constant at inflation?
• A Systematic Study of the Stochastic Gravitational-Wave Background due to Stellar Core Collapse
• Scale Factor Duality: A Quantum Cosmological Approach
• Time and space dependent backgrounds from nonsupersymmetric strings
• Modulated Reheating and Large Non-Gaussianity in String Cosmology
• Unitary null energy condition violation in $P(X)$ cosmologies
• Dark energy: investigation and modeling
• Singularity and exit problems in two-dimensional string cosmology
• Cosmological Perturbations Through a General Relativistic Bounce
• Boundary Conditions in Quantum String Cosmology
• Realizing Scale-invariant Density Perturbations in Low-energy Effective String Theory
• Scalar perturbations in regular two-component bouncing cosmologies
• Trans-Planckian wimpzillas
• Cosmological solutions, p-branes and the Wheeler-DeWitt equation
• Moduli Stabilization in String Gas Cosmology
• Spectra of primordial fluctuations in two-perfect-fluid regular bounces
• Unique Fingerprints of Alternatives to Inflation in the Primordial Power Spectrum
• Nonsingular Ekpyrotic Cosmology with a Nearly Scale-Invariant Spectrum of Cosmological Perturbations and Gravitational Waves
• S-brane to thermal non-singular string cosmology
• Nonsingular Bianchi type I cosmological solutions from 1-loop superstring effective action
• The Oscillating Universe: an Alternative to Inflation
• The Primordial Perturbation Spectrum from Various Expanding and Contracting Phases
• Electromagnetic Origin of the CMB Anisotropy in String Cosmology
• Extended Warm Inflation
• Cosmic Perturbations Through the Cyclic Ages
• Planck and BICEP/Keck Array 2018 constraints on primordial gravitational waves and perspectives for future B-mode polarization measurements
• Dilatonic Interpretation of the Quintessence?
• Has the Universe always expanded ?
• AdS and stabilized extra dimensions in multidimensional gravitational models with nonlinear scalar curvature terms 1/R and R^4
• Accessibility of the Pre-Big-Bang Models to LIGO
• How unitary cosmology generalizes thermodynamics and solves the inflationary entropy problem
• Four Dimensional Gravitational Backgrounds Based on N=4 c=4 Superconformal Systems
• Cosmological Phases of the String Thermal Effective Potential
• D-branes and Cosmology
• Scalar Perturbations in Scalar Field Quantum Cosmology
• Swampland conjecture in $f(R)$ gravity by the Noether Symmetry Approach
• A solution to the anisotropy problem in bouncing cosmologies
• Near Scale Invariance with Modified Dispersion Relations
• Induced superstring cosmologies and moduli stabilization
• Inflationary and Deflationary Branches in Extended Pre--Big Bang Cosmology
• A Model of the Stochastic Gravitational-Wave Background due to Core Collapse to Black Holes
• Neutron stars in $f(R)$ gravity and scalar-tensor theories
• Ekpyrotic Cosmology with a Zero-Shear S-Brane
• Detecting relic gravitational radiation from string cosmology with LIGO
• Non-singular string cosmology via ${\alpha }^{\prime }$ corrections
• Non-singular string cosmology in a 2d Hybrid model
• Homogeneous Conformal String Backgrounds
• Gravitational wave background in perfect fluid quantum cosmologies
• On the new string theory inspired mechanism of generation of cosmological perturbations
• A non-singular bouncing cosmology in $f(R,T)$ gravity
• Observing Trans-Planckian Signatures in the Cosmic Microwave Background
• Marginal Deformations of Vacua with Massive boson-fermion Degeneracy Symmetry
• Nature of singularities in anisotropic string cosmology
• Inflation from Extra Dimensions
• Cosmic Dynamics of Bose-Einstein Condensates
• High energy physics and the very-early Universe with LISA
• An Inflationary Non-singular Quantum Cosmological Model
• Relaxed Bounds on the Dilaton Mass in a String Cosmology Scenario
• Heterotic M-Theory Cosmology in Four and Five Dimensions
• Perturbations in Matter Bounce with Non-minimal Coupling
• Second Einstein Telescope Mock Data and Science Challenge: Low Frequency Binary Neutron Star Data Analysis
• Regular two-component bouncing cosmologies and perturbations therein
• Induced gravity, and minimally and conformally coupled scalar fields in Bianchi-I cosmological models
• Bouncing Unitary Cosmology I: Mini-Superspace General Solution
• Inflation in Oscillating Universe
• Attraction to a radiation-like era in early superstring cosmologies
• Dynamics of Shearfree Dissipative Collapse in f(G) Gravity
• Constraints on pre-big bang parameter space from CMBR anisotropies
• Regular cosmological solutions in low energy effective action from string theories
• Closed Inhomogeneous String Cosmologies
• Measuring the non-Gaussian stochastic gravitational-wave background: a method for realistic interferometer data
• On Dualities Of Primordial Perturbation Spectra
• String Gas Cosmology after Planck
• Beyond Inflation: A Cyclic Universe Scenario
• Black holes and gravitational waves in string cosmology
• Pulsar timing array observations as possible hints for nonsingular cosmology
• String Cosmology backgrounds from Classical String Geometry
• Bimetric structure formation: non-Gaussian predictions
• Back Reaction of Strings in Self-Consistent String Cosmology
• Intensity and anisotropies of the stochastic Gravitational Wave background from merging compact binaries in galaxies
• Orbifold Symmetry Reductions of Massive Boson-Fermion Degeneracy
• Kinetic Inflation in Stringy and Other Cosmologies
• Can String Theory Avoid Cosmological Singularities?
• Inflationary Theory versus Ekpyrotic/Cyclic Scenario
• Strings in Singular Time-Dependent Backgrounds
• The anamorphic universe
• Observable gravitational waves in pre-big bang cosmology: an update
• Scalar and Tensor Inhomogeneities from Dimensional Decoupling
• Cosmological Perturbations on a Bouncing Brane
• Cosmic Microwave Background anisotropies and extra dimensions in String Cosmology
• Gravitational Waves in Bouncing Cosmologies from Gauge Field Production
• Measuring stochastic gravitational-wave energy beyond general relativity
• Moving Five-Branes in Low-Energy Heterotic M-Theory
• Superhorizon curvaton amplitude in inflation and pre-big bang cosmology
• Planck residuals anomaly as a fingerprint of alternative scenarios to inflation
• A Semi-Parametric Approach to the Detection of Non-Gaussian Gravitational Wave Stochastic Backgrounds
• Theoretical Aspects of Quintom Models
• Cosmological entropy and generalized second law of thermodynamics in $F(R,G)$ theory of gravity
• Reconstruction of a Nonminimal Coupling Theory with Scale-invariant Power Spectrum
• Canonical and quantum FRW cosmological solutions in M-theory
• Bouncing Palatini cosmologies and their perturbations
• Cosmic magnetism, curvature and the expansion dynamics
• Cosmological Perturbations Across an S-brane
• Constraints on pre-big bang models for seeding large-scale anisotropy by massive Kalb-Ramond axions
• Challenges for String Gas Cosmology
• Effects of Electromagnetic Field on The Collapse and Expansion of Anisotropic Gravitating Source
• Construction of nonsingular cosmological solutions in string theories
• Atypical k-essence cosmologies
• Perturbations in a Bouncing Brane Model
• Expanding and contracting universes in third quantized string cosmology
• Adiabatic Spectra During Slowly Evolving
• String Cosmology and Inflation
• Geometric Precipices in String Cosmology
• On the Transfer of Metric Fluctuations when Extra Dimensions Bounce or Stabilize
• Searching for parity violation with the LIGO-Virgo-KAGRA network
• T-Dual Cosmological Solutions of Double Field Theory II
• String duality transformations in $f(R)$ gravity from Noether symmetry approach
• Particle production in string cosmology models
• Massive string modes and non-singular pre-big-bang cosmology
• Cosmological constant problem: deflation during inflation
• Quantum propagation across cosmological singularities
• Dynamical back-reaction of relic gravitons
• Born-Again Braneworld
• Initial Conditions and the Structure of the Singularity in Pre-Big-Bang Cosmology
• Sensitivity of wide band detectors to quintessential gravitons
• Generality of Singularity Avoidance in Superstring Theory: Anisotropic Case
• Cos(M)ological Solutions in M- and String Theory
• M-theory resolution of four-dimensional cosmological singularities via U-duality
• Collapse and Expansion of Anisotropic Plane Symmetric Source
• Toward inflation models compatible with the no-boundary proposal
• Construct ${\alpha }^{\prime }$ corrected or loop corrected solutions without curvature singularities
• Searching for a matter bounce cosmology with low redshift observations
• Cosmological Solution in M-theory on S^1/Z_2
• Cosmological Rescaling through Warped Space
• Cosmological density perturbations from perturbed couplings
• Regular black holes, universes without singularities, and phantom-scalar field transitions
• K-Bounce
• Unconventional Cosmology
• Dynamics of M-Theory Cosmology
• Dual Space-Time and Nonsingular String Cosmology
• Scale Invariance via a Phase of Slow Expansion
• General solution for scalar perturbations in bouncing cosmologies
• Poisson-Lie Duality in the String Effective Action
• Experimental Search for Quantum Gravity
• Supersymmetric Quantization of Anisotropic Scalar-Tensor Cosmologies
• Covariant c-flation: a variational approach
• Scalar field haloes as gravitational lenses
• General constraints on Horndeski wormhole throats
• On the Transfer of Adiabatic Fluctuations through a Nonsingular Cosmological Bounce
• Simple Dynamics on the Brane
• T-duality and high-derivative gravity theories: the BTZ black hole/string paradigm
• Separable Brane Cosmologies in Heterotic M-Theory
• U-duality Covariant M-theory Cosmology
• Cosmology with a successful Vainshtein screening in theories beyond Horndeski
• The Behavior of Kasner Cosmologies with Induced Matter
• Gravitational waves in non-singular string cosmologies
• On Bouncing Brane-Worlds, S-branes and Branonium Cosmology
• On thermodynamics second law in the modified Gauss Bonnet gravity
• The cosmology with the Dp-brane gas
• Exact spherically symmetric solutions in modified Gauss-Bonnet gravity from Noether symmetry approach
• Natural Inflation in SUSY and Gauge-Mediated Curvature of the Flat Directions
• Graceful exit via polymerization of pre-big bang cosmology
• What if Time Really Exists?
• General Cosmological Features of the Einstein-Yang-Mills-Dilaton System
• Primordial Gravitational Waves Induced by Magnetic Fields in an Ekpyrotic Scenario
• Generalized Second Law in String Cosmology
• $O(d,d)$ Symmetry in Quantum Cosmology
• Stability of the Einstein Static Universe in $4D$ Gauss-Bonnet Gravity
• Anisotropic 'hairs' in string cosmology
• Non-singular pre-big bang scenarios from all-order ${\alpha }^{\prime }$ corrections
• Cosmological Structure Problem of the Pre-Big Bang Scenario
• String-inspired cosmology
• Does brane cosmology have realistic principles?
• Towards a Stringy Resolution of the Cosmological Singularity
• Effects of anisotropy and spatial curvature on the pre-big bang scenario
• Dilaton cosmology and the Modified Uncertainty Principle
• A Back-reaction Induced Lower Bound on the Tensor-to-Scalar Ratio
• Does accelerating universe indicates Brans-Dicke theory
• The Primordial Gravitational Wave Background in String Cosmology
• Spectrum of Cuscuton Bounce
• Dynamics in interacting scalar-torsion theory
• String cosmology versus standard and inflationary cosmology
• TASI Lectures: Cosmology for String Theorists
• Heating up the cold bounce
• Spherical Curvature Inhomogeneities in String Cosmology
• Nonsingular Cosmology from an Interacting Vacuum
• Generalised perturbation equations in bouncing cosmologies
• Early Universe Evolution in Graviton-Dilaton Models
• Qualitative Analysis of String Cosmologies
• No-boundary measure and preference for large e-foldings in multi-field inflation
• Point Particle Motion in DFT and a Singularity-Free Cosmological Solution
• Regular Cosmological Examples of Tree-Level Dilaton-Driven Models
• Reheating and dangerous relics in pre-big bang string cosmology
• The curvaton as a Bose-Einstein condensate of chiral pseudo Nambu-Goldstone bosons
• Parity violation in pre-inflationary bounce
• Inhomogeneous Einstein-Rosen String Cosmology
• Gravity's rainbow: a bridge between LQC and DSR
• Bianchi type I universes with dilaton and magnetic fields
• D-branes, String Cosmology and Large Extra Dimensions
• Exact inhomogeneous Einstein-Maxwell-Dilaton cosmologies
• Phase space analysis of the bouncing universe with stringy effects
• Arrows of Time in the Bouncing Universes of the No-boundary Quantum State
• Perturbations in a regular bouncing Universe
• Gravitational production of gravitinos
• On the Trans-Planckian Censorship Conjecture and the Generalized Non-Minimal Coupling
• Primordial Features as Evidence for Inflation
• The Confining Heterotic Brane Gas: A Non-Inflationary Solution to the Entropy and Horizon Problems of Standard Cosmology
• Can the Big Bang Singularity be avoided by a single scalar field?
• Solution of the Size and Horizon Problems from Classical String Geometry
• Fermion production from preheating-amplified metric perturbations
• Graviton Spectra in String Cosmology
• Brane-World Inflation and the Transition to Standard Cosmology
• Bouncing pre-big bang on the brane
• Symmetric vacuum scalar--tensor cosmology
• CMB anisotropies from pre-big bang cosmology
• No-boundary Wave Function, Wheeler-DeWitt Equation and Path Integral Analysis of the Bouncing `Quantum' Cosmology
• Dynamical Topology Change, Compactification and Waves in String Cosmology
• From the string vacuum to FLRW or de Sitter via ${\alpha }^{\prime }$ corrections
• Colliding String Waves and Duality
• Existence and disappearance of conical singularities in Gleyzes-Langlois-Piazza-Vernizzi theories
• Gravitational collapse in non-minimally coupled gravity: finite density singularities and the breaking of the no-hair theorem
• Massive gravity and the suppression of anisotropies and gravitational waves in a matter-dominated contracting universe
• Scalar Perturbations Through Cycles
• Pre-big bang model has Planck problem
• Blue Spectra of Kalb-Ramond Axions and Fully Anisotropic String Cosmologies
• Canonical and path integral quantisation of string cosmology models
• Emergent Universe in the Braneworld Scenario
• Scale Factor Dualities in Anisotropic Cosmologies
• Strong Coupling Problem with Time-Varying Sound Speed
• Gauss-Bonnet braneworld redux: A novel scenario for the bouncing universe
• Normal modes for metric fluctuations in a class of higher-dimensional backgrounds
• Emergent Universe Scenario, Bouncing and Cyclic Universes in Degenerate Massive Gravity
• Constraining Galileon gravity from observational data with growth rate
• The Interface of Cosmology with String and M(ILLENNIUM) Theory
• Qualitative properties of scalar-tensor theories of Gravity
• Back-Reaction to Dilaton-Driven Inflation
• Spherically symmetric black holes in the limiting curvature theory of gravity
• Fully Anisotropic String Cosmologies, Maxwell Fields and Primordial Shear
• Gravitational-wave constraints on scalar-tensor gravity from a neutron star and black-hole binary GW200115
• Initial Conditions in String Cosmology
• Scalar tensor theory of gravity carrying a conserved current
• Low-energy quantum string cosmology
• Early cosmology and the stochastic gravitational wave background
• Can the Type-IIB axion prevent Pre-big Bang inflation?
• On the degree of scale invariance of inflationary perturbations
• Perturbations in a Holographic Universe and in Other Stiff Fluid Cosmologies
• Phantom Behavior Bounce with Tachyon and Non-minimal Derivative Coupling
• Cosmic acceleration from interaction of ordinary fluids
• Gauge-ready formulation of cosmological perturbations in scalar-vector-tensor theories
• Anisotropic Four-Dimensional NS-NS String Cosmology
• Moduli-Induced Vacuum Destabilisation
• On `Graceful Exit' from inflationary phase in two-dimensional Liouville String Cosmology
• Deformed phase space in a two dimensional minisuperspace model
• A classical, non-singular, bouncing universe
• Self-interacting scalar field cosmologies: unified exact solutions and symmetries
• Singularity free dilaton-driven cosmologies and pre-little-bang
• Characteristic Formulation for Metric $f(R)$ Gravity
• Cosmologies from higher-order string corrections
• Detecting a relic background of scalar waves with LIGO
• The simplest possible bouncing quantum cosmological model
• Anisotropic Inflation and the Origin of Four Large Dimensions
• Asymptotic Behaviour of Inhomogeneous String Cosmologies
• String Cosmology
• Massive fermion production in nonsingular superstring cosmology
• Tilted String Cosmologies
• Tensors, BICEP2, prior dependence, and dust
• Initial singularity free quantum cosmology in two-dimensional Brans-Dicke theory
• Fingerprints of a Non-Inflationary Universe from Massive Fields
• Response of the common mode of interferometric detectors to a stochastic background of massive scalar radiation
• Intricacies of Cosmological bounce in polynomial metric $f(R)$ gravity for flat FLRW spacetime
• Higher Loop String Cosmology with Moduli and Antisymmetric Tensor Field
• Gravitational-wave background in bouncing models from semi-classical, quantum and string gravity
• Constraints on Models with a Break in the Primordial Power Spectrum
• Some Cosmological Consequences of Non Trivial PPN Parameters $\beta$ and $\gamma$
• Probing signatures of bounce inflation with current observations
• Big Bang riddles and their revelations
• Symmetries for generating string cosmologies
• Cosmological perturbations in transient phantom inflation scenarios
• Emergent Cosmos in Einstein-Cartan Theory
• Scale Factor Duality for Conformal Cyclic Cosmologies
• Keeping an Eye on DBI: Power-counting for small-$c_s$ Cosmology
• Duality transformation and conformal equivalent scalar-tensor theories
• Dynamical Analysis of Scalar Field Cosmologies with Spatial Curvature
• Bouncing cosmology from nonlinear dark energy with two cosmological constants
• Supergravity Brane Cosmologies
• Bianchi-I cosmologies, magnetic fields and singularities
• Homogeneous magnetic fields in fully anisotropic string cosmological backgrounds
• Holographic Curvature Perturbations in a Cosmology with a Space-Like Singularity
• Modular Quantum Cosmology
• Why CMB physics?
• A Solution to the Graceful Exit Problem in Pre-Big Bang Cosmology
• Evolution of linear perturbations through a bouncing world model: Is the near Harrison-Zel'dovich spectrum possible via a bounce?
• Numerical Study of Inhomogeneous Pre-Big-Bang Inflationary Cosmology
• Kalb-Ramond axion production in anisotropic string cosmologies
• Stochastic collapse
• Resolving naked singularities in ${\alpha }^{\prime }$-corrected string theory
• Constraints on the production of primordial magnetic seeds in pre-big bang cosmology
• Goldilocks Models of Higher-Dimensional Inflation (including modulus stabilization)
• New Horizons in Cosmology with Spectral Distortions of the Cosmic Microwave Background
• Primordial Black Holes from Pre-Big Bang inflation
• Current status of gravitational-wave observations
• Non-singular Cyclic Cosmology without Phantom Menace
• Cerenkov radiation and scalar stars
• Low-energy graceful exit in anisotropic string cosmology backgrounds
• Sourced Scalar Fluctuations in Bouncing Cosmology
• From Big Crunch to Big Bang: A Quantum String Cosmology Perspective
• Cosmological Quantum String Vacua and String-String Duality
• Dynamics of Cosmological Perturbations and Reheating in the Anamorphic Universe
• Testing theories of Gravity and Supergravity with inflation and observations of the cosmic microwave background
• String Theory and The Arrow of Time
• Non-Minimal Quintessence With Nearly Flat Potential
• Quantum string cosmology
• Quantum creation and inflationary universes: a critical appraisal
• Early and Late-time Cosmic Acceleration in Non-minimal Yang-Mills-$f(G)$ Gravity
• From pre- to post-big bang: an (almost) self-dual cosmological history
• The optimal approach of detecting stochastic gravitational wave from string cosmology using multiple detectors
• Qualitative evolution in higher-loop string cosmology
• G1 Cosmologies with Gravitational and Scalar Waves
• Achieving pole-law inflation:the extreme inflation
• Reheating constraints on mutated hilltop inflation
• Universal properties of the evolution of the Universe in modified loop quantum cosmology
• Internal symmetry in Bianchi type-I cosmologies
• Observable (?) cosmological signatures of superstrings in pre-big bang models of inflation
• Gravitational Fluctuations as an Alternative to Inflation
• Qualitative Analysis of Isotropic Curvature String Cosmologies
• Dark Matter Axions in Models of String Cosmology
• Non-singular model universe from a perfect fluid scalar-metric cosmology
• Constraining string cosmology with the gravitational-wave background using the NANOGrav 15-year data set
• Scalar warm inflation in holographic cosmology
• Constraining the stochastic gravitational wave from string cosmology with current and future high frequency detectors
• Complex Scalar fields in Scalar-Tensor and Scalar-Torsion theories
• Cosmological perturbation spectra from SL(4,R)-invariant effective actions
• Limitations of an Effective Field Theory Treatment of Early Universe Cosmology
• Bouncing cosmology in the limiting curvature theory of gravity
• Mirror Images of String Cosmologies
• An AdS Crunch in Supergravity
• Metric-Affine Formalism of Higher Derivative Scalar Fields in Cosmology
• A note on inflationary string cosmology
• Search for stochastic gravitational-wave background from string cosmology with Advanced LIGO and Virgo's O1$\sim$O3 data
• Removing the Big Bang Singularity: The role of the generalized uncertainty principle in quantum gravity
• Cuscuton Bounce Beyond the Linear Regime: Bispectrum and Strong Coupling Constraints
• On the initial regime of pre-big bang cosmology
• Classical and Quantum Cosmology in Einstein-aether Scalar-tensor gravity: Noether Symmetry Analysis
• On the relation between boundary proposals and hidden symmetries of the extended pre-big bang quantum cosmology
• Constraints on the Pre-Big Bang scenario from a cosmological interpretation of the NANOGrav data
• Running of the Spectral index in Deformed Matter Bounce Scenarios with Hubble-rate-dependent Dark Energy
• Back-Reaction of Gravitational Waves Revisited
• Pre-big bang on the brane
• On a finite universe with no beginning or end
• Scalar Perturbation Spectra in an Emergent Cosmological Island
• Rotational inhomogeneities from pre-big bang?
• The graviton background at early times in string cosmology
• Perturbations in Bouncing Cosmological Models
• Primordial magnetic seeds from string cosmology
• Relic gravitons on Kasner-like branes
• Graviton production from extra dimensions
• Entropic issues in contemporary cosmology
• Cosmic superstrings in large volume compactifications: PTAs, LISA and time-varying tension
• Particle Production near an AdS Crunch
• Entropy generation and inflation in wave collision induced pre-big-bang cosmology
• Moving Five-Branes and Membrane Instantons in Low Energy Heterotic M-Theory
• Cold and Hot Dark Matter from a Single Nonthermal Relic
• Anisotropic String Cosmology at Large Curvatures
• String Cosmology: The Pre-Big Bang Scenario
• Dilatonic Domain Walls and Curved Intersecting Branes
• Pre-Big Bang Cosmology and Quantum Fluctuations
• Tilted Ekpyrosis
• On cosmologically induced hierarchies in string theory
• Cosmic Black Holes
• Non-Abelian T-duality in Pre-Big-Bang Cosmology
• Novel Symmetries in Axion-Dilaton Cosmology
• Emergent D-instanton as a source of Dark Energy
• Saving the universe with finite volume effects
• Universal scattering laws for quiescent bouncing cosmology
• The fate of classical tensor inhomogeneities in pre-big-bang string cosmology
• Rotational Perturbations in Neveu-Schwarz-Neveu-Schwarz String Cosmology
• Non-Abelian Duality in the String Effective Action
• Quantum gravity and gravitational-wave astronomy
• Direct Detection of Primordial Gravitational Waves in a BSI Inflationary Model
• Warm Inflation with Barrow Holographic Dark Energy
• Regular Friedmann Universes and Matter Transformations
• Non-local Matching Condition and Scale-invariant Spectrum in Bouncing Cosmology
• Cyclic spacetimes through singularity scattering maps. The laws of quiescent bounces
• Complexity and the Big Bang
• Three dimensional regular black string via loop corrections
• Bound to bounce: a coupled scalar-tachyon model for a smooth bouncing/cyclic universe
• Curvature perturbations from dimensional decoupling
• Hitchhiker's Guide to the Swampland: The Cosmologist's Handbook to the string-theoretical Swampland Programme
• Non-Gaussian signatures of Tachyacoustic Cosmology
• Attractor Solutions in Tachyacoustic Cosmology
• Supersymmetric Vacuum Configurations in String Cosmology
• Recent Developments in Degenerate Higher Order Scalar Tensor Theories
• On Primordial Perturbations of Test Scalar Fields
• A description of classical and quantum cosmology for a single scalar field torsion gravity
• The Inflationary Role of the Dilaton in String Cosmology
• Aspects of String Cosmology
• Time-dependent toroidal compactification proposals and the Bianchi type II model: classical and quantum solutions
• Rotation in string cosmology
• Crossing the Big Bang singularity
• Scalar field fluctuations in Pre-Big-Bang Cosmologies
• O(d,d)-invariance in inhomogeneous string cosmologies with perfect fluid
• Gravitational Fluctuations as an Alternative to Inflation II. CMB Angular Power Spectrum
• Exact inflationary solutions
• Prediction of radio-quiet gamma-ray pulsar distances using the Fundamental Plane relation
• Recent developments in quantum string cosmology
• Variations of the Fine Structure Constant in Space and Time
• Lectures on Naturalness, String Landscape and Multiverse
• Pre-big bang in M-theory
• Spontaneous dark-matter mass generation along cosmological attractors in string theory
• "All that matter ... in one Big Bang ...," & other cosmological singularities
• From DeWitt initial condition to Cosmological Quantum Entanglement
• Manifestly T-dual formulation of AdS space
• Astrophysical and cosmological considerations on a string dilaton of a least coupling
• On the prior dependence of constraints on the tensor-to-scalar ratio
• Self-T-Dual Brane Cosmology and the Cosmological Constant Problem
• Massless and massive graviton spectra in anisotropic dilatonic braneworld cosmologies
• Generating Generalized $G_{D-2}$ solutions
• Universe bouncing its way to inflation
• The cosmological constant problem in heterotic-M-theory and the orbifold of time
• Induced Matter Theory of gravity from a Weitzenböck 5D vacuum and pre-big bang collapse of the universe
• Theory of Cosmological Perturbations and Applications to Superstring Cosmology
• AdS cycles in eternally inflating background
• A tachyonic extension of the stringy no-go theorem
• A Cosmological Model of Holographic Brane Gravity
• Compactification of IIB Theory with Fluxes and Axion-Dilaton String Cosmology
• Analysis of the Gravitational Wave Background Using Gamma-Ray Pulsar Timing Arrays with Next-Generation Detectors
• Strong coupling and instabilities in singularity-free inflation from an infinite sum of curvature corrections
• Production and Detection of Cosmic Gravitational Wave Background in String Cosmology
• De Sitter Bounces
• Decompactification near the horizon and non-vanishing entropy
• Classical defocussing of world lines -- Cosmological Implications
• Conformal Scale Factor Inversion for Domain Walls and Holography
• Nonperturbative Formulations of Superstring Theory
• A dark radiation era prior to the inflationary phase
• Two non-perturbative ${\alpha }^{\prime }$ corrected or loop corrected string cosmological solutions
• Curing singularities: From the big bang to black holes
• Does History Repeat Itself? Periodic Time Cosmology
• How much will we learn from the CMB ?
• One-loop bosonic string and De Sitter space
• Long-wavelength approximation for string cosmology with barotropic perfect fluid
• Lecture on Quantum Gravity with Perimeter Action and Gravitational Singularities
• Non-BPS D9-branes in the Early Universe
• Is the use of Christoffel connection in gravity theories conceptually correct?
• Following the density perturbations through a bounce with AdS/CFT Correspondence
• String theory and primordial cosmology
• Topological Ghosts: the Teeming of the Shrews
• Curvaton mechanism and its implications to sneutrino cosmology
• Adiabatic fluctuations from cosmic strings in a contracting universe
• Quasi-matter Bounce Cosmology in Light of Planck
• Unifying turnaround-bounce cosmology in a cyclic universe considering a running vacuum model
• The Earliest Phase Transition?
• Mixmaster Horava-Witten Cosmology
• Quantum mechanics before the big bang in heterotic-M-theory
• Thermodynamical Stability of Hagedorn and Radiation Regimes in Closed String Gas Cosmology
• A Cosmology of a Trans-Planckian Theory and Dark Energy
• PhD Thesis: String theory in the early universe
• Non singular M theory Universe in Loop Quantum Cosmology -- inspired Models
• 4+1 D homogeneous anisotropic string cosmological models with dilaton and anti-symmetric matter
• Revisiting Schwarzschild black hole singularity through string theory
• Crunching, Bouncing, and Cyclical Cosmologies from Dark Sector Interactions
• The emergent Big Bang scenario
• Looking Beyond Inflationary Cosmology
• Cosmological backreaction of heavy string states
• Quantum Creation of a Toy Universe without Inflation
• $O(d,d)$ symmetry in teleparallel dark energy
• A simple example of "non-minimal" Pre-Big Bang scenario
• Cosmic acceleration from string induced Galileons
• Non singular, bouncing M theory universe
• Do We Live in a Vanilla Universe? Theoretical Perspectives on WMAP
• DILATON-DRIVEN INFLATION IN STRING COSMOLOGY
• Transition between Schwarzschild black hole and string black hole
• Gravity with Perimeter Action and Gravitational Singularities
• Duality and cosmological compactification of superstrings with unbroken supersymmetry
• Exact Cosmological Solutions of 4D String Gravity in the String Frame
• Duality in String Cosmology
• Inflation in String Theory and how you can get out of it