Vacuum Structure and the Arrow of Time
arXiv:1112.3341 · doi:10.1103/PhysRevD.86.123509
Abstract
We find ourselves in an extended era of entropy production. Unlike most other observations, the arrow of time is usually regarded as a constraint on initial conditions. I argue, however, that it primarily constrains the vacuum structure of the theory. I exhibit simple scalar field potentials in which low-entropy initial conditions are not necessary, or not sufficient, for an arrow of time to arise. I argue that the string theory landscape gives rise to an arrow of time independently of the initial entropy, assuming a plausible condition on the lifetime of its metastable vacua. The dynamical resolution of the arrow of time problem arises from the same structural properties of the string landscape that allow it to solve the cosmological constant problem without producing an empty universe, particularly its high dimensionality and the large difference in vacuum energy between neighboring vacua.
31 pages JHEP format, 3 figures
References in corpus (21)
- Holographic probabilities in eternal inflation
- TASI Lectures on the Cosmological Constant
- The Cosmological Constant and the String Landscape
- Computational complexity of the landscape I
- Predicting the Cosmological Constant from the Causal Entropic Principle
- Eternal Inflation: The Inside Story
- Predicting the cosmological constant with the scale-factor cutoff measure
- Properties of the scale factor measure
- Is Our Universe Likely to Decay within 20 Billion Years?
- Spontaneous Inflation and the Origin of the Arrow of Time
- Evidence for the Multiverse in the Standard Model and Beyond
- Multiverse Understanding of Cosmological Coincidences
- Complementarity in the Multiverse
- Landscape Predictions from Cosmological Vacuum Selection
- How unitary cosmology generalizes thermodynamics and solves the inflationary entropy problem
- A geometric solution to the coincidence problem, and the size of the landscape as the origin of hierarchy
- Unitary Evolution and Cosmological Fine-Tuning
- Predictions of the causal entropic principle for environmental conditions of the universe
- Entropy and initial conditions in cosmology
- Saturating the holographic entropy bound
- Out of equilibrium: understanding cosmological evolution to lower-entropy states
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- Life at the Interface of Particle Physics and String Theory
- Sharpening the Distance Conjecture in Diverse Dimensions
- Asymptotic Scalar Field Cosmology in String Theory
- Watchers of the multiverse
- The Static Quantum Multiverse
- Computational Complexity and Black Hole Horizons
- Fractal-Flows and Time's Arrow
- The CMB and the measure of the multiverse
- String Theory and The Arrow of Time
- Tuning, Ergodicity, Equilibrium and Cosmology
- Inflation as a Solution to the Early Universe Entropy Problem
- Multi-Vacuum Initial Conditions and the Arrow of Time
- Multiverse rate equation including bubble collisions
- Localization on the Landscape and Eternal Inflation
- On the Carroll-Chen Model
- Algebra of distributions of quantum-field densities and space-time properties
- Eternal Inflation with Arrival Terminals
- Disentangling the Cosmic/Comoving Duality: The Cognitive Stability and Typicality Tests