No-boundary measure and preference for large e-foldings in multi-field inflation
arXiv:1207.0359 · doi:10.1088/0264-9381/30/16/165016
Abstract
The no-boundary wave function of quantum gravity usually assigns only very small probability to long periods of inflation. This was a reason to doubt about the no-boundary wave function to explain the observational universe. We study the no-boundary proposal in the context of multi-field inflation to see whether the number of fields changes the situation. For a simple model, we find that indeed the no-boundary wave function can give higher probability for sufficient inflation, but the number of fields involved has to be very high.
16 pages, 2 figures
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- Fuzzy instantons in landscape and swampland: review of the Hartle-Hawking wave function and several applications
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