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Title: Fuzzy Euclidean wormholes in de Sitter space

Here, we investigate Euclidean wormholes in Einstein gravity with a massless scalar field in de Sitter space. Euclidean wormholes are possible due to the analytic continuation of the time as well as complexification of fields, where we need to impose the classicality after the Wick-rotation to the Lorentzian signatures. Furthermore, we prefer wormholes for some parameters, rather than Hawking-Moss instantons, and hence wormholes can be more fundamental than Hawking-Moss type instantons. Euclidean wormholes can be interpreted in three ways: (1) classical big bounce, (2) either tunneling from a small to a large universe or a creation of a collapsing and an expanding universe from nothing, and (3) either a transition from a contracting to a bouncing phase or a creation of two expanding universes from nothing. These various interpretations shed some light on challenges of singularities. In addition, these will help to understand tensions between various kinds of quantum gravity theories.
Authors:
 [1] ;  [2] ;  [3]
  1. National Taiwan Univ., Taipei (Taiwan). Leung Center for Cosmology and Particle Astrophysics, Dept. of Physics, Graduate Inst. of Astrophysics; SLAC National Accelerator Lab., Menlo Park, CA (United States). Kavli Inst. for Particle Astrophysics and Cosmology
  2. National Taiwan Univ., Taipei (Taiwan). Leung Center for Cosmology and Particle Astrophysics, Dept. of Physics, Graduate Inst. of Astrophysics; Stockholm Univ. (Sweden). Dept. of Physics
  3. National Taiwan Univ., Taipei (Taiwan). Leung Center for Cosmology and Particle Astrophysics
Publication Date:
Grant/Contract Number:
AC02-76SF00515
Type:
Accepted Manuscript
Journal Name:
Journal of Cosmology and Astroparticle Physics
Additional Journal Information:
Journal Volume: 2017; Journal Issue: 07; Journal ID: ISSN 1475-7516
Publisher:
Institute of Physics (IOP)
Research Org:
SLAC National Accelerator Lab., Menlo Park, CA (United States)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
79 ASTRONOMY AND ASTROPHYSICS
OSTI Identifier:
1389546

Chen, Pisin, Hu, Yao-Chieh, and Yeom, Dong-han. Fuzzy Euclidean wormholes in de Sitter space. United States: N. p., Web. doi:10.1088/1475-7516/2017/07/001.
Chen, Pisin, Hu, Yao-Chieh, & Yeom, Dong-han. Fuzzy Euclidean wormholes in de Sitter space. United States. doi:10.1088/1475-7516/2017/07/001.
Chen, Pisin, Hu, Yao-Chieh, and Yeom, Dong-han. 2017. "Fuzzy Euclidean wormholes in de Sitter space". United States. doi:10.1088/1475-7516/2017/07/001. https://www.osti.gov/servlets/purl/1389546.
@article{osti_1389546,
title = {Fuzzy Euclidean wormholes in de Sitter space},
author = {Chen, Pisin and Hu, Yao-Chieh and Yeom, Dong-han},
abstractNote = {Here, we investigate Euclidean wormholes in Einstein gravity with a massless scalar field in de Sitter space. Euclidean wormholes are possible due to the analytic continuation of the time as well as complexification of fields, where we need to impose the classicality after the Wick-rotation to the Lorentzian signatures. Furthermore, we prefer wormholes for some parameters, rather than Hawking-Moss instantons, and hence wormholes can be more fundamental than Hawking-Moss type instantons. Euclidean wormholes can be interpreted in three ways: (1) classical big bounce, (2) either tunneling from a small to a large universe or a creation of a collapsing and an expanding universe from nothing, and (3) either a transition from a contracting to a bouncing phase or a creation of two expanding universes from nothing. These various interpretations shed some light on challenges of singularities. In addition, these will help to understand tensions between various kinds of quantum gravity theories.},
doi = {10.1088/1475-7516/2017/07/001},
journal = {Journal of Cosmology and Astroparticle Physics},
number = 07,
volume = 2017,
place = {United States},
year = {2017},
month = {7}
}