Science in a Very Large Universe

Details Science in a Very Large Universe Science in a Very Large Universe

2009-05-29

arxiv.org/abs/0906.0042v3

Phys Rev D 81, 123524 (2010)

Physics

High Energy Physics

High Energy Physics - Theory

14 pages, revised and expanded in v2, correction to App. A (suggested by D. Page) in v3

Scientific paper

As observers of the universe we are quantum physical systems within it. If the universe is very large in space and/or time, the probability becomes significant that the data on which we base predictions is replicated at other locations in spacetime. The physical conditions at these locations that are not specified by the data may differ. Predictions of our future observations therefore require an assumed probability distribution (the xerographic distribution) for our location among the possible ones. It is the combination of basic theory plus the xerographic distribution that can be predictive and testable by further observations.

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