Authors
Chris Smeenk
University of Western Ontario
Abstract
Inflationary cosmology has been widely accepted due to its successful predictions: for a “generic” initial state, inflation produces a homogeneous, flat, bubble with an appropriate spectrum of density perturbations. However, the discovery that inflation is “generically eternal,” leading to a vast multiverse of inflationary bubbles with different low-energy physics, threatens to undermine this account. There is a “predictability crisis” in eternal inflation, because extracting predictions apparently requires a well-defined measure over the multiverse. This has led to discussions of anthropic predictions based on a measure over the multiverse, and an assumption that we are typical observers. I will give a pessimistic assessment of attempts to make predictions in this sense, emphasizing in particular problems that arise even if a unique measure can be found.
Keywords inflation  cosmology
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Reprint years 2014
DOI 10.1016/j.shpsb.2013.11.003
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References found in this work BETA

The Quantum Vacuum and the Cosmological Constant Problem.Svend E. Rugh & Henrik Zinkernagel - 2002 - Studies in History and Philosophy of Science Part B: Studies in History and Philosophy of Modern Physics 33 (4):663-705.

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Citations of this work BETA

Does Inflation Solve the Hot Big Bang Model׳s Fine-Tuning Problems?C. McCoy - 2015 - Studies in History and Philosophy of Modern Physics 51:23-36.
The Implementation, Interpretation, and Justification of Likelihoods in Cosmology.C. D. McCoy - 2018 - Studies in History and Philosophy of Modern Physics 62:19-35.
Fine-Tuning as Old Evidence, Double Counting, and the Multiverse.Simon Friederich - 2017 - International Studies in the Philosophy of Science 31 (4):363-377.

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