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The Path Integral for Volume-Weighted Eternal Inflation

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In this talk I present a path integral formulation of slow-roll stochastic inflation that can be naturally extended to incorporate volume-weighting effects. We can gain much insight into what happens in eternal inflation by looking for saddle points of the path integral—- perhaps surprisingly, some of the saddle points turn out to be complex! Thus we can investigate the end of eternal inflation (i.e. the “youngness paradox”) and the (in-)sensitivity of eternal inflation to initial conditions.

This talk is part of the Cosmology Lunch series.

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