Comments on the no boundary wavefunction and slow roll inflation
arxiv(2024)
摘要
We review aspects of the Hartle-Hawking no boundary geometry in the context
of slow roll inflation. We give an analytic approximation to the geometry and
we explain the rationale for the proposal. We also explain why it gives a
prediction for the curvature of the universe that is in disagreement with
observations and give a quick review of proposed ways to resolve that
disagreement.
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