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Title: Eddington-inspired-Born–Infeld tensorial instabilities neutralized in a quantum approach

Abstract

The recent direct detection of gravitational waves has highlighted the huge importance of the tensorial modes in any extended gravitational theory. One of the most appealing approaches to extend gravity beyond general relativity is the Eddington-inspired-Born–Infeld gravity which is formulated within the Palatini approach. This theory can avoid the Big Bang singularity in the physical metric although a Big Bang intrinsic to the affine connection is still there, which in addition couples to the tensorial sector and might jeopardize the viability of the model. In this paper, we suggest that a quantum treatment of the affine connection, or equivalently of its compatible metric, is able to rescue the model. We carry out such an analysis and conclude that from a quantum point of view such a Big Bang is unharmful. We expect therefore that the induced tensorial instability, caused by the Big Bang intrinsic to the affine connection, can be neutralized at the quantum level.

Authors:
; ; ORCiD logo;
Publication Date:
Research Org.:
SLAC National Accelerator Lab., Menlo Park, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
1605200
Grant/Contract Number:  
[No. 107-2119-M-002-005; No. 108-2811-M-002-682; FIS2017-85076-P; CA15117; AC02-76SF00515; No. IT956-16]
Resource Type:
Accepted Manuscript
Journal Name:
European Physical Journal. C, Particles and Fields
Additional Journal Information:
[ Journal Volume: 80; Journal Issue: 1]; Journal ID: ISSN 1434-6044
Country of Publication:
United States
Language:
English

Citation Formats

Albarran, Imanol, Bouhmadi-López, Mariam, Chen, Che-Yu, and Chen, Pisin. Eddington-inspired-Born–Infeld tensorial instabilities neutralized in a quantum approach. United States: N. p., 2020. Web. doi:10.1140/epjc/s10052-019-7598-2.
Albarran, Imanol, Bouhmadi-López, Mariam, Chen, Che-Yu, & Chen, Pisin. Eddington-inspired-Born–Infeld tensorial instabilities neutralized in a quantum approach. United States. doi:10.1140/epjc/s10052-019-7598-2.
Albarran, Imanol, Bouhmadi-López, Mariam, Chen, Che-Yu, and Chen, Pisin. Wed . "Eddington-inspired-Born–Infeld tensorial instabilities neutralized in a quantum approach". United States. doi:10.1140/epjc/s10052-019-7598-2.
@article{osti_1605200,
title = {Eddington-inspired-Born–Infeld tensorial instabilities neutralized in a quantum approach},
author = {Albarran, Imanol and Bouhmadi-López, Mariam and Chen, Che-Yu and Chen, Pisin},
abstractNote = {The recent direct detection of gravitational waves has highlighted the huge importance of the tensorial modes in any extended gravitational theory. One of the most appealing approaches to extend gravity beyond general relativity is the Eddington-inspired-Born–Infeld gravity which is formulated within the Palatini approach. This theory can avoid the Big Bang singularity in the physical metric although a Big Bang intrinsic to the affine connection is still there, which in addition couples to the tensorial sector and might jeopardize the viability of the model. In this paper, we suggest that a quantum treatment of the affine connection, or equivalently of its compatible metric, is able to rescue the model. We carry out such an analysis and conclude that from a quantum point of view such a Big Bang is unharmful. We expect therefore that the induced tensorial instability, caused by the Big Bang intrinsic to the affine connection, can be neutralized at the quantum level.},
doi = {10.1140/epjc/s10052-019-7598-2},
journal = {European Physical Journal. C, Particles and Fields},
number = [1],
volume = [80],
place = {United States},
year = {2020},
month = {1}
}

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