Dissipative Emergence of Inflation from Quasi-Cyclic Universe

Abstract

Inflationary models, especially those with plateau-type potentials, are consistent with the cosmological data, but inflation itself does not resolve the initial singularity. This singularity is resolved, for example, by the idea of the quantum creation of the Universe from nothing such as the tunneling and no-boundary proposals. The simplest one predicts a closed Universe. Motivated by these facts, we investigate the classical dynamics of a closed universe with a plateau-type potential. Depending on the initial inflaton field value, the universe can undergo a variety of events: an immediate big crunch, a bounce or cyclic phase, and inflation. Although the non-inflationary solutions may appear irrelevant to our Universe, they can be turned into single or multiple bounces followed by inflation, taking into account the interactions necessary for the reheating of the Universe after inflation. Thus, the dissipative mechanism in our setup explains both the graceful entry to and exit from inflation and gives us an indirect observational handle on the Universe just after creation. We also comment on the implications of these solutions for probabilistic interpretations of the wave function of the Universe.

63 pages, 12 figures; published version with reorganized sections and clarified explanations

References in corpus (45)

• The Standard Model Higgs boson as the inflaton
• BICEP / Keck XIII: Improved Constraints on Primordial Gravitational Waves using Planck, WMAP, and BICEP/Keck Observations through the 2018 Observing Season
• Higgs inflation: consistency and generalisations
• The Unity of Cosmological Attractors
• The Atacama Cosmology Telescope: DR6 Gravitational Lensing Map and Cosmological Parameters
• Lectures on the Swampland Program in String Compactifications
• The Eighteenth Data Release of the Sloan Digital Sky Surveys: Targeting and First Spectra from SDSS-V
• Improved limits on the tensor-to-scalar ratio using BICEP and Planck
• Gravitational waves at interferometer scales and primordial black holes in axion inflation
• The Classical Universes of the No-Boundary Quantum State
• The Sphaleron Rate in SU(N) Gauge Theory
• No Rescue for the No Boundary Proposal
• The Real No-Boundary Wave Function in Lorentzian Quantum Cosmology
• The art of simulating the early Universe -- Part I
• CosmoLattice
• Challenges for Large-Field Inflation and Moduli Stabilization
• The No-Boundary Proposal as a Path Integral with Robin Boundary Conditions
• Inflation with a Negative Cosmological Constant
• Dark Energy Radiation
• Discovery of Large Scale Tensor Mode and Chaotic Inflation in Supergravity
• Pure Natural Inflation
• Tachyonic Preheating in Palatini $R^2$ Inflation
• Planck and BICEP/Keck Array 2018 constraints on primordial gravitational waves and perspectives for future B-mode polarization measurements
• Minimal warm inflation with complete medium response
• On the past-completeness of inflationary spacetimes
• Classical Inflationary and Ekpyrotic Universes in the No-Boundary Wavefunction
• Warming up cold inflation
• Bouncing Universe from Nothing
• The no-boundary proposal in biaxial Bianchi IX minisuperspace
• On the No-Boundary Proposal for Ekpyrotic and Cyclic Cosmologies
• Disentangling the $f(R)$ - Duality
• Nonthermal Gravitino Production after Large Field Inflation
• Axion Models with High Scale Inflation
• The Wave Function of Simple Universes, Analytically Continued From Negative to Positive Potentials
• Fluctuation-dissipation dynamics of cosmological scalar fields
• On the Creation of the Universe via Ekpyrotic Instantons
• Cyclic Inflation
• Stablizing oscillating universes against quantum decay
• T-Model Inflation and Bouncing Cosmology
• DeWitt boundary condition is consistent in Hořava-Lifshitz quantum gravity
• No Smooth Spacetime in Lorentzian Quantum Cosmology and Trans-Planckian Physics
• DeWitt wave function in Hořava-Lifshitz cosmology with tensor perturbation
• Illustrating SUSY breaking effects on various inflation mechanisms
• Slow-roll approximation in quantum cosmology
• Swampland Constraints on No-Boundary Quantum Cosmology

Cited by in corpus (2)

• Present and future of CosmoLattice
• Delicate curvature bounces in the no-boundary wave function and in the late universe