A Stochastic Measure for Eternal Inflation

Details A Stochastic Measure for Eternal Inflation A Stochastic Measure for Eternal Inflation

2007-06-12

arxiv.org/abs/0706.1691v1

JCAP 0708:007,2007

Physics

High Energy Physics

High Energy Physics - Theory

11 pages, 1 figure

Scientific paper

10.1088/1475-7516/2007/08/007

We use the stochastic approach to investigate the measure for slow roll eternal inflation. The probability for the universe of a given Hubble radius can be calculated in this framework. In a solvable model, it is shown that the probability for the universe to evolve from a state with a smaller Hubble radius to that of a larger Hubble radius is dominated by the classical probability without the stochastic source. While the probability for the universe to evolve from a larger Hubble radius to a smaller one is suppressed by $\exp(-\Delta S)$, where the de Sitter entropy $S$ arises naturally in this stochastic approach.

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