Why concave rather than convex inflaton potential?
Abstract
The Planck data on cosmic microwave background indicates that the Starobinsky-type model with concave inflation potential is favored over the convex-type chaotic inflation. Is there any reason for that? Here we argue that if our universe began with a Euclidean wormhole, then the Starobinsky-type inflation is probabilistically favored. It is known that for a more generic choice of parameters than that originally assumed by Hartle and Hawking, the Hartle–Hawking wave function is dominated by Euclidean wormholes, which can be interpreted as the creation of two classical universes from nothing. We show that only one end of the wormhole can be classicalized for a convex potential, while both ends can be classicalized for a concave potential. The latter is therefore more probable.
- Authors:
-
- National Taiwan University, Taipei (Taiwan); SLAC National Accelerator Lab., Menlo Park, CA (United States); Stanford Univ., CA (United States)
- Asia Pacific Center for Theoretical Physics, Pohang (Korea); POSTECH, Pohang (Korea)
- Publication Date:
- Research Org.:
- SLAC National Accelerator Lab., Menlo Park, CA (United States)
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 1490621
- Grant/Contract Number:
- AC02-76SF00515
- Resource Type:
- Accepted Manuscript
- Journal Name:
- European Physical Journal. C, Particles and Fields
- Additional Journal Information:
- Journal Volume: 78; Journal Issue: 10; Journal ID: ISSN 1434-6044
- Publisher:
- Springer
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 79 ASTRONOMY AND ASTROPHYSICS
Citation Formats
Chen, Pisin, and Yeom, Dong-han. Why concave rather than convex inflaton potential?. United States: N. p., 2018.
Web. doi:10.1140/epjc/s10052-018-6357-0.
Chen, Pisin, & Yeom, Dong-han. Why concave rather than convex inflaton potential?. United States. https://doi.org/10.1140/epjc/s10052-018-6357-0
Chen, Pisin, and Yeom, Dong-han. Fri .
"Why concave rather than convex inflaton potential?". United States. https://doi.org/10.1140/epjc/s10052-018-6357-0. https://www.osti.gov/servlets/purl/1490621.
@article{osti_1490621,
title = {Why concave rather than convex inflaton potential?},
author = {Chen, Pisin and Yeom, Dong-han},
abstractNote = {The Planck data on cosmic microwave background indicates that the Starobinsky-type model with concave inflation potential is favored over the convex-type chaotic inflation. Is there any reason for that? Here we argue that if our universe began with a Euclidean wormhole, then the Starobinsky-type inflation is probabilistically favored. It is known that for a more generic choice of parameters than that originally assumed by Hartle and Hawking, the Hartle–Hawking wave function is dominated by Euclidean wormholes, which can be interpreted as the creation of two classical universes from nothing. We show that only one end of the wormhole can be classicalized for a convex potential, while both ends can be classicalized for a concave potential. The latter is therefore more probable.},
doi = {10.1140/epjc/s10052-018-6357-0},
journal = {European Physical Journal. C, Particles and Fields},
number = 10,
volume = 78,
place = {United States},
year = {Fri Oct 26 00:00:00 EDT 2018},
month = {Fri Oct 26 00:00:00 EDT 2018}
}
Web of Science
Figures / Tables:
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