Open Inflation Without False Vacua
Abstract
We show that within the framework of a definite proposal for the initial conditions for the universe, the Hartle-Hawking `no boundary' proposal, open inflation is generic and does not require any special properties of the inflaton potential. In the simplest inflationary models, the semiclassical approximation to the Euclidean path integral and a minimal anthropic condition lead to 0≈ 0.01. This number may be increased in models with more fields or extra dimensions.
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