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Title: On gravitational waves in Born-Infeld inspired non-singular cosmologies

Abstract

We study the evolution of gravitational waves for non-singular cosmological solutions within the framework of Born-Infeld inspired gravity theories, with special emphasis on the Eddington-inspired Born-Infeld theory. We review the existence of two types of non-singular cosmologies, namely bouncing and asymptotically Minkowski solutions, from a perspective that makes their features more apparent. We study in detail the propagation of gravitational waves near these non-singular solutions and carefully discuss the origin and severity of the instabilities and strong coupling problems that appear. We also investigate the role of the adiabatic sound speed of the matter sector in the regularisation of the gravitational waves evolution. We extend our analysis to more general Born-Infeld inspired theories where analogous solutions are found. As a general conclusion, we obtain that the bouncing solutions are generally more prone to instabilities, while the asymptotically Minkowski solutions can be rendered stable, making them appealing models for the early universe.

Authors:
 [1];  [2];  [3];  [4]
  1. Aix-Marseille Université, Université de Toulon, CNRS, CPT, Marseille (France)
  2. Institute for Theoretical Studies, ETH Zurich, Clausiusstrasse 47, 8092 Zurich (Switzerland)
  3. Depto. de Física Teórica and IFIC, Universidad de Valencia—CSIC, Calle Dr. Moliner 50, Burjassot 46100, Valencia (Spain)
  4. Instituto de Astrofísica e Ciências do Espaço, Faculdade de Ciências da Universidade de Lisboa, Edifício C8, Campo Grande, P-1749-016 Lisbon (Portugal)
Publication Date:
OSTI Identifier:
22667639
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Cosmology and Astroparticle Physics; Journal Volume: 2017; Journal Issue: 10; Other Information: Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; BORN-INFELD THEORY; COMPUTERIZED SIMULATION; COSMOLOGY; EVOLUTION; GRAVITATIONAL WAVES; INSTABILITY; MINKOWSKI SPACE; SOUND WAVES; STRONG-COUPLING MODEL; UNIVERSE; VELOCITY

Citation Formats

Jiménez, Jose Beltrán, Heisenberg, Lavinia, Olmo, Gonzalo J., and Rubiera-Garcia, Diego, E-mail: jose.beltran@uam.es, E-mail: lavinia.heisenberg@eth-its.ethz.ch, E-mail: gonzalo.olmo@uv.es, E-mail: drgarcia@fc.ul.pt. On gravitational waves in Born-Infeld inspired non-singular cosmologies. United States: N. p., 2017. Web. doi:10.1088/1475-7516/2017/10/029.
Jiménez, Jose Beltrán, Heisenberg, Lavinia, Olmo, Gonzalo J., & Rubiera-Garcia, Diego, E-mail: jose.beltran@uam.es, E-mail: lavinia.heisenberg@eth-its.ethz.ch, E-mail: gonzalo.olmo@uv.es, E-mail: drgarcia@fc.ul.pt. On gravitational waves in Born-Infeld inspired non-singular cosmologies. United States. doi:10.1088/1475-7516/2017/10/029.
Jiménez, Jose Beltrán, Heisenberg, Lavinia, Olmo, Gonzalo J., and Rubiera-Garcia, Diego, E-mail: jose.beltran@uam.es, E-mail: lavinia.heisenberg@eth-its.ethz.ch, E-mail: gonzalo.olmo@uv.es, E-mail: drgarcia@fc.ul.pt. Sun . "On gravitational waves in Born-Infeld inspired non-singular cosmologies". United States. doi:10.1088/1475-7516/2017/10/029.
@article{osti_22667639,
title = {On gravitational waves in Born-Infeld inspired non-singular cosmologies},
author = {Jiménez, Jose Beltrán and Heisenberg, Lavinia and Olmo, Gonzalo J. and Rubiera-Garcia, Diego, E-mail: jose.beltran@uam.es, E-mail: lavinia.heisenberg@eth-its.ethz.ch, E-mail: gonzalo.olmo@uv.es, E-mail: drgarcia@fc.ul.pt},
abstractNote = {We study the evolution of gravitational waves for non-singular cosmological solutions within the framework of Born-Infeld inspired gravity theories, with special emphasis on the Eddington-inspired Born-Infeld theory. We review the existence of two types of non-singular cosmologies, namely bouncing and asymptotically Minkowski solutions, from a perspective that makes their features more apparent. We study in detail the propagation of gravitational waves near these non-singular solutions and carefully discuss the origin and severity of the instabilities and strong coupling problems that appear. We also investigate the role of the adiabatic sound speed of the matter sector in the regularisation of the gravitational waves evolution. We extend our analysis to more general Born-Infeld inspired theories where analogous solutions are found. As a general conclusion, we obtain that the bouncing solutions are generally more prone to instabilities, while the asymptotically Minkowski solutions can be rendered stable, making them appealing models for the early universe.},
doi = {10.1088/1475-7516/2017/10/029},
journal = {Journal of Cosmology and Astroparticle Physics},
number = 10,
volume = 2017,
place = {United States},
year = {Sun Oct 01 00:00:00 EDT 2017},
month = {Sun Oct 01 00:00:00 EDT 2017}
}