Eternal observers and bubble abundances in the landscape

Abstract

We study a class of ``landscape'' models in which all vacua have positive energy density, so that inflation never ends and bubbles of different vacua are endlessly ``recycled''. In such models, each geodesic observer passes through an infinite sequence of bubbles, visiting all possible kinds of vacua. The bubble abundance $p_j$ can then be defined as the frequency at which bubbles of type $j$ are visited along the worldline of an observer. We compare this definition with the recently proposed general prescription for $p_j$ and show that they give identical results.

References in corpus (3)

• The Anthropic Landscape of String Theory
• Probabilities in the landscape: The decay of nearly flat space
• Probabilities in the landscape

Cited by in corpus (21)

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• Holographic probabilities in eternal inflation
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• Towards a gauge invariant volume-weighted probability measure for eternal inflation
• Hurdles for Recent Measures in Eternal Inflation
• A measure of the multiverse
• Geodesic measures of the landscape
• Stationary Measure in the Multiverse
• Is Our Universe Decaying at an Astronomical Rate?
• Eternal Inflation, past and future
• Measures on transitions for cosmology from eternal inflation
• The scale of gravity and the cosmological constant within a landscape
• Dynamics of false vacuum bubbles with nonminimal coupling
• Reheating-volume measure for random-walk inflation
• Reheating-volume measure in the landscape
• Bayesian Reasoning in Eternal Inflation: A Solution to the Measure Problem
• Typicality, Freak Observers and the Anthropic Principle of Existence
• A Local Wheeler-DeWitt Measure for the String Landscape
• Worldlines as Wilson Lines