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Title: Primordial cosmology in mimetic born-infeld gravity

Here, the Eddington-inspired-Born-Infeld (EiBI) model is reformulated within the mimetic approach. In the presence of a mimetic field, the model contains non-trivial vacuum solutions which could be free of spacetime singularity because of the Born-Infeld nature of the theory. We study a realistic primordial vacuum universe and prove the existence of regular solutions, such as primordial inflationary solutions of de Sitter type or bouncing solutions. Besides, the linear instabilities present in the EiBI model are found to be avoidable for some interesting bouncing solutions in which the physical metric as well as the auxiliary metric are regular at the background level.
Authors:
 [1] ;  [2] ;  [3]
  1. Univ. of The Basque Country UPV/EHU, Bilbao (Spain); Basque Foundation for Science, Bilbao (Spain)
  2. National Taiwan Univ., Taipei (Taiwan)
  3. National Taiwan Univ., Taipei (Taiwan); Stanford Univ., Stanford, CA (United States). SLAC National Accelerator Lab.
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: 11; 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; cosmic singularity; cosmological perturbation theory; modified gravity
OSTI Identifier:
1419313

Bouhmadi-Lopez, Mariam, Chen, Che -Yu, and Chen, Pisin. Primordial cosmology in mimetic born-infeld gravity. United States: N. p., Web. doi:10.1088/1475-7516/2017/11/053.
Bouhmadi-Lopez, Mariam, Chen, Che -Yu, & Chen, Pisin. Primordial cosmology in mimetic born-infeld gravity. United States. doi:10.1088/1475-7516/2017/11/053.
Bouhmadi-Lopez, Mariam, Chen, Che -Yu, and Chen, Pisin. 2017. "Primordial cosmology in mimetic born-infeld gravity". United States. doi:10.1088/1475-7516/2017/11/053.
@article{osti_1419313,
title = {Primordial cosmology in mimetic born-infeld gravity},
author = {Bouhmadi-Lopez, Mariam and Chen, Che -Yu and Chen, Pisin},
abstractNote = {Here, the Eddington-inspired-Born-Infeld (EiBI) model is reformulated within the mimetic approach. In the presence of a mimetic field, the model contains non-trivial vacuum solutions which could be free of spacetime singularity because of the Born-Infeld nature of the theory. We study a realistic primordial vacuum universe and prove the existence of regular solutions, such as primordial inflationary solutions of de Sitter type or bouncing solutions. Besides, the linear instabilities present in the EiBI model are found to be avoidable for some interesting bouncing solutions in which the physical metric as well as the auxiliary metric are regular at the background level.},
doi = {10.1088/1475-7516/2017/11/053},
journal = {Journal of Cosmology and Astroparticle Physics},
number = 11,
volume = 2017,
place = {United States},
year = {2017},
month = {11}
}