Taming the Runaway Problem of Inflationary Landscapes
arXiv:hep-th/0601028 · doi:10.1103/PhysRevD.73.103502
Abstract
A wide variety of vacua, and their cosmological realization, may provide an explanation for the apparently anthropic choices of some parameters of particle physics and cosmology. If the probability on various parameters is weighted by volume, a flat potential for slow-roll inflation is also naturally understood, since the flatter the potential the larger the volume of the sub-universe. However, such inflationary landscapes have a serious problem, predicting an environment that makes it exponentially hard for observers to exist and giving an exponentially small probability for a moderate universe like ours. A general solution to this problem is proposed, and is illustrated in the context of inflaton decay and leptogenesis, leading to an upper bound on the reheating temperature in our sub-universe. In a particular scenario of chaotic inflation and non-thermal leptogenesis, predictions can be made for the size of CP violating phases, the rate of neutrinoless double beta decay and, in the case of theories with gauge-mediated weak scale supersymmetry, for the fundamental scale of supersymmetry breaking.
arXiv comment31 pages, including 3 figures
References in corpus (50)
- Generating the curvature perturbation without an inflaton
- Quantization of Four-form Fluxes and Dynamical Neutralization of the Cosmological Constant
- Adiabatic CMB perturbations in pre-big bang string cosmology
- Effects of Cosmological Moduli Fields on Cosmic Microwave Background
- Nongaussian Isocurvature Perturbations from Inflation
- The statistics of string/M theory vacua
- The Anthropic Landscape of String Theory
- Leptogenesis as the origin of matter
- Thermal Production of Gravitinos
- Distributions of flux vacua
- From the Big Bang Theory to the Theory of a Stationary Universe
- A new mechanism for generating density perturbations from inflation
- The shape of non-Gaussianities
- Dimensionless constants, cosmology and other dark matters
- Predictions from Quantum Cosmology
- Counting Flux Vacua
- Inflation and Eternal Inflation
- Statistical properties of exoplanets II. Metallicity, orbital parameters, and space velocities
- Observational Consequences of a Landscape
- Non-Gaussianities in models with a varying inflaton decay rate
- The Galactic Habitable Zone I. Galactic Chemical Evolution
- Likely Values of the Cosmological Constant
- What does inflation really predict?
- Probabilities in the inflationary multiverse
- Fluctuations of the Gravitational Constant in the Inflationary Brans-Dicke Cosmology
- Why is the CMB fluctuation level 10^{-5}?
- Supergravity at Colliders
- Is There A String Theory Landscape
- Stationary Universe
- Parent Stars of Extrasolar Planets VII: New Abundance Analyses of 30 Systems
- Enumerating Flux Vacua with Enhanced Symmetries
- The cosmological constant and the time of its dominance
- Stationarity of Inflation and Predictions of Quantum Cosmology
- On the Taxonomy of Flux Vacua
- Statistics of M theory Vacua
- Predictability crisis in inflationary cosmology and its resolution
- Anthropic prediction for Lambda and the Q catastrophe
- Testable anthropic predictions for dark energy
- Unambiguous probabilities in an eternally inflating universe
- A prescription for probabilities in eternal inflation
- Density Perturbations and the Cosmological Constant from Inflationary Landscapes
- Removing Ambiguities in the Neutrino Mass Matrix
- Mass Extinctions and The Sun's Encounters with Spiral Arms
- Counting Pockets with World Lines in Eternal Inflation
- Vacuum Energy: "If Not Now, Then When?"
- Vacuum Energy: If Not Now, Then When?
- Dark Matter and Baryon Asymmetry of the Universe in Large-Cutoff Supergravity
- Gravitino and Goldstino at Colliders
- Realization of Minimal Supergravity
- Predictions on the neutrinoless double beta decay from the leptogenesis via the LHu flat direction
Cited by in corpus (19)
- Sinks in the Landscape, Boltzmann Brains, and the Cosmological Constant Problem
- Boltzmann brains and the scale-factor cutoff measure of the multiverse
- Inflating in a Better Racetrack
- Predicting the cosmological constant with the scale-factor cutoff measure
- Life at the Interface of Particle Physics and String Theory
- A Universe Without Weak Interactions
- Accidental Inflation in String Theory
- What can the observation of nonzero curvature tell us?
- Return of the Boltzmann Brains
- A measure of the multiverse
- Stationary Measure in the Multiverse
- Measure Problem for Eternal and Non-Eternal Inflation
- The distribution of Omega_k from the scale-factor cutoff measure
- The scale of gravity and the cosmological constant within a landscape
- Bubble collisions and measures of the multiverse
- Negative vacuum energy densities and the causal diamond measure
- Probabilities in the landscape
- Anthropic predictions for vacuum energy and neutrino masses in the light of WMAP-3
- Volume Weighting the Measure of the Universe from Classical Slow-Roll Expansion