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Title: Eternal Inflation and Its Implications
Originating Office: IAS
Speaker: Guth, Alan
Issue Date: 1-Jun-2011
Event Date: 1-Jun-2011
Group/Series/Folder: Record Group 8.15 - Institute for Advanced Study
Series 3 - Audio-visual Materials
Location: 8.15:3 box 1.7
Notes: IAS Conference on Cosmology since Einstein.
IAS title: Plenary Talk 3.
Abstract: Almost all models of inflation lead to eternal inflation: once inflation starts, it never stops, but instead goes on forever producing a multiverse of pocket universes. If the multiverse is real, then it can offer a plausible explanation for the smallness of the cosmological constant. But if we really live in a multiverse, then anything that can happen will happen an infinite number of times, and the distinction between common and rare events becomes hard to define. Prof Guth discusses attempts to define a probability measure that regularizes these infinities. Different measures can give very different probabilities, but he argues that only a narrow class of measures – similar to scale factor cutoff measure – appear to be viable. A common feature of successful measures is that they do not favor huge amounts of inflation, so the probability of observing spatial curvature is not absurdly small.
Duration: 56 min.
Appears in Series:8.15:3 - Audio-visual Materials
Videos for Public -- Distinguished Lectures