String Gas Cosmology: Progress and Problems
arXiv:1105.3247 · doi:10.1088/0264-9381/28/20/204005
Abstract
String Gas Cosmology is a model of the evolution of the very early universe based on fundamental principles and key new degrees of freedom of string theory which are different from those of point particle field theories. In String Gas Cosmology the universe starts in a quasi-static Hagedorn phase during which space is filled with a gas of highly excited string states. Thermal fluctuations of this string gas lead to an almost scale-invariant spectrum of curvature fluctuations. Thus, String Gas Cosmology is an alternative to cosmological inflation as a theory for the origin of structure in the universe. This short review focuses on the building blocks of the model, the predictions for late time cosmology, and the main problems which the model faces.
17 pages, 4 figures, invited short review for the Special Issue of CQG on String Cosmology, typo corrected
References in corpus (17)
- String Cosmology: A Review
- Tensor Modes from a Primordial Hagedorn Phase of String Cosmology
- Pointer states for primordial fluctuations in inflationary cosmology
- String Gas Cosmology and Structure Formation
- Non-perturbative Gravity, Hagedorn Bounce & CMB
- On the Decoherence of Primordial Fluctuations During Inflation
- More on the Spectrum of Perturbations in String Gas Cosmology
- Detecting Cosmic Strings in the CMB with the Canny Algorithm
- On the new string theory inspired mechanism of generation of cosmological perturbations
- Stabilizing moduli with thermal matter and nonperturbative effects
- Geometric Precipices in String Cosmology
- Inflation Free, Stringy Generation of Scale-Invariant Cosmological Fluctuations in D = 3 + 1 Dimensions
- Towards A Nonsingular Tachyonic Big Crunch
- Right-Handed Sector Leptogenesis
- String Gas Cosmology and Non-Gaussianities
- S-duality in String Gas Cosmology
- Inflation from String Theory
Cited by in corpus (53)
- Encyclopaedia Inflationaris
- Bouncing Cosmologies: Progress and Problems
- A Critical Review of Classical Bouncing Cosmologies
- Structure of neutron, quark and exotic stars in Eddington-inspired Born-Infeld gravity
- The universe as a quantum gravity condensate
- Single field inflation in the light of Pulsar Timing Array Data: Quintessential interpretation of blue tilted tensor spectrum through Non-Bunch Davies initial condition
- Constraining chameleon field driven warm inflation with Planck 2018 data
- Black hole formation in a contracting universe
- Emergent Universe and Genesis from the DHOST Cosmology
- Draining the Swampland
- Observational effects from quantum cosmology
- String Gas Cosmology after Planck
- String Cosmology backgrounds from Classical String Geometry
- Cosmological perturbations in non-local higher-derivative gravity
- Gravitational Waves in Bouncing Cosmologies from Gauge Field Production
- T-Dual Cosmological Solutions of Double Field Theory II
- T-dual cosmological solutions in double field theory
- Unconventional Cosmology
- Dual Space-Time and Nonsingular String Cosmology
- Improved DHOST Genesis
- Particle Production in Ekpyrotic Scenarios
- Point Particle Motion in DFT and a Singularity-Free Cosmological Solution
- Solution of the Size and Horizon Problems from Classical String Geometry
- Aspects of non-singular bounce in modified gravity theories
- A quantum cosmology approach to cosmic coincidence and inflation
- Some physical implications of regularization ambiguities in SU(2) gauge-invariant loop quantum cosmology
- On three dimensions as the preferred dimensionality of space via the Brandenberger-Vafa mechanism
- Polymer inflation
- Minimizing the tensor-to-scalar ratio in single-field inflation models
- Breaking of Spatial Diffeomorphism Invariance, Inflation and the Spectrum of Cosmological Perturbations
- The Cosmological Spinor
- Gravitational-wave background in bouncing models from semi-classical, quantum and string gravity
- Differentiating G-inflation from String Gas Cosmology using the Effective Field Theory Approach
- Constraining the Break of Spatial Diffeomorphism Invariance with Planck Data
- Back-Reaction of Gravitational Waves Revisited
- Running of the Spectrum of Cosmological Perturbations in String Gas Cosmology
- Gauge Issues in Extended Gravity and f(R) Cosmology
- Bose-Einstein condensation as an alternative to inflation
- Emergent universe revisited through the CSL theory
- Testing time-delayed cosmology
- Quantum gravity and gravitational-wave astronomy
- Strings in compact cosmological spaces
- On the Regularizability of the Big Bang Singularity
- A quasi-matter bounce equivalent to Starobinsky inflation
- Reconstructing inflationary potential from NANOGrav 15-year Data: A robust study using Non-Bunch Davies initial condition
- Viable Curvaton Models from the Parameter
- Towards degeneracy breaking of early universe models
- Lecture notes on thermodynamics of ideal string gases and its application in cosmology
- Constraints on the radiation temperature before inflation
- Towards a general description of the interior structure of rotating black holes
- Curvature-Assisted Dynamical Compactification in a Pre-Inflationary Higher-Dimensional Universe
- Conformally coupled inflation
- Microscopic approach to string gas cosmology