Cosmology of the Very Early Universe

Abstract

In these lectures I focus on early universe models which can explain the currently observed structure on large scales. I begin with a survey of inflationary cosmology, the current paradigm for understanding the origin of the universe as we observe it today. I will discuss some progress and problems in inflationary cosmology before moving on to a description of two alternative scenarios - the Matter Bounce and String Gas Cosmology. All early universe models connect to observations via the evolution of cosmological perturbations - a topic which will be discussed in detail in these lectures.

38 pages, 15 figures, to be published in the proceedings of the XIV Special Course in Astronomy, Observatorio Nacional, Brazil

References in corpus (28)

• Quantum Gravity at a Lifshitz Point
• The Standard Model Higgs boson as the inflaton
• Primordial Non-Gaussianities from Inflation Models
• Matter Bounce in Horava-Lifshitz Cosmology
• The Lee-Wick Standard Model
• Tensor Modes from a Primordial Hagedorn Phase of String Cosmology
• Probing String Theory with Modulated Cosmological Fluctuations
• String Gas Cosmology and Structure Formation
• Non-Gaussianity in a Matter Bounce
• A Model Of Inflationary Cosmology Without Singularity
• Thermal Fluctuations and Bouncing Cosmologies
• Detecting Cosmic Strings in the CMB with the Canny Algorithm
• Back Reaction of Cosmological Perturbations and the Cosmological Constant Problem
• Vector Perturbations in a Contracting Universe
• Processing of Cosmological Perturbations in a Cyclic Cosmology
• Stabilizing moduli with thermal matter and nonperturbative effects
• Cosmological Perturbations on a Bouncing Brane
• Challenges for String Gas Cosmology
• Geometric Precipices in String Cosmology
• Inflation Free, Stringy Generation of Scale-Invariant Cosmological Fluctuations in D = 3 + 1 Dimensions
• A Study of Structure Formation and Reheating in the D3/D7 Brane Inflation Model
• Towards A Nonsingular Tachyonic Big Crunch
• On the Transfer of Adiabatic Fluctuations through a Nonsingular Cosmological Bounce
• String Gas Cosmology and Non-Gaussianities
• S-duality in String Gas Cosmology
• Dynamical Decompactification and Three Large Dimensions
• Constraints on Models with a Break in the Primordial Power Spectrum
• Bouncing Cosmologies

Cited by in corpus (65)

• Bounce cosmology from $F(R)$ gravity and $F(R)$ bigravity
• Bouncing cosmology in modified Gauss-Bonnet gravity
• Two Field Matter Bounce Cosmology
• A Matter Bounce By Means of Ghost Condensation
• The Matter Bounce Curvaton Scenario
• Anisotropy in a Nonsingular Bounce
• Bouncing cosmological solutions from f(R,T) gravity
• An Extended Matter Bounce Scenario: current status and challenges
• Preheating a bouncing universe
• The Pseudo-Conformal Universe: Scale Invariance from Spontaneous Breaking of Conformal Symmetry
• String Gas Cosmology: Progress and Problems
• Evolution of cosmological perturbations and the production of non-Gaussianities through a nonsingular bounce: Indications for a no-go theorem in single field matter bounce cosmologies
• Bounce universe from string-inspired Gauss-Bonnet gravity
• Viability of the matter bounce scenario in Loop Quantum Cosmology for general potentials
• Bounce solutions in viscous fluid cosmology
• On $R+\alpha R^2$ Loop Quantum Cosmology
• Effect of the Generalized Uncertainty Principle on Post-Inflation Preheating
• Quasi-matter domination parameters in bouncing cosmologies
• Early Structure Formation from Cosmic String Loops in Light of Early JWST Observations
• Preinflationary dynamics in loop quantum cosmology: Monodromy Potential
• Emergent Cosmology from Matrix Theory
• Black hole formation in a contracting universe
• Bounce Loop Quantum Cosmology Corrected Gauss-Bonnet Gravity
• Quantum aspects of chaos and complexity from bouncing cosmology: A study with two-mode single field squeezed state formalism
• Little Rip, $\Lambda$CDM and singular dark energy cosmology from Born-Infeld-$f(R)$ gravity
• String Gas Cosmology after Planck
• Cosmological density perturbations from conformal scalar field: infrared properties and statistical anisotropy
• Reheating after S-Brane Ekpyrosis
• A Radiation Bounce from the Lee-Wick Construction?
• Gravitational particle production in bouncing cosmologies
• Reconstruction of a Nonminimal Coupling Theory with Scale-invariant Power Spectrum
• Cosmological Perturbations Across an S-brane
• Emergent Universe from Energy-Momentum Squared Gravity
• Tracing Primordial Black Holes in Nonsingular Bouncing Cosmology
• Cosmographic analysis of a closed bouncing universe with the varying cosmological constant in $f(R,T)$ gravity
• Scalar tilt from broken conformal invariance
• Properties of scalar perturbations generated by conformal scalar field
• The Cosmological OTOC: Formulating new cosmological micro-canonical correlation functions for random chaotic fluctuations in Out-of-Equilibrium Quantum Statistical Field Theory
• Searching for a matter bounce cosmology with low redshift observations
• Thermodynamics of nonsingular bouncing universes
• Bounce Universe Induced by an Inhomogeneous Dark Fluid Coupled with Dark Matter
• Unconventional Cosmology
• The Asymptotic Behavior of Bouncing Cosmological Models in $F(\mathcal{G})$ Gravity Theory
• Magnetogenesis in bouncing cosmology
• Particle Production in Ekpyrotic Scenarios
• Background dynamics of pre-inflationary scenario in Brans-Dicke loop quantum cosmology
• How can holonomy corrections be introduced in $f(R)$ gravity?
• Note on Reheating in G-inflation
• Bouncing cosmologies via modified gravity in the ADM formalism: Application to Loop Quantum Cosmology
• Breaking of Spatial Diffeomorphism Invariance, Inflation and the Spectrum of Cosmological Perturbations
• The matter-ekpyrotic bounce scenario in Loop Quantum Cosmology
• Primordial Gravitational Wave Circuit Complexity
• Inhomogeneous Dark Fluid and Dark Matter, Leading to a Bounce Cosmology
• Unitarity Problems for an Effective Field Theory Description of Early Universe Cosmology
• Dynamics of Cosmological Perturbations and Reheating in the Anamorphic Universe
• Towards conformal cosmology
• Anisotropic Bouncing Scenario in $F(X)-V(\varphi )$ model
• Loop Quantum Cosmology with a noncommutative quantum deformed photon gas
• Holographic bounce cosmological models induced by viscous dark fluid from a generalized non-singular entropy function
• Quantum Gravity, Hydrodynamics and Emergent Cosmology: A Collection of Perspectives
• The twilight of the single field slow rolling inflaton
• Extra Dimensions, Dilaton and Dark Energy
• Crunching, Bouncing, and Cyclical Cosmologies from Dark Sector Interactions
• Anisotropic Cyclic Universe in $F(X)-V(\varphi )$ model
• Conformally coupled inflation