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Ultralocality and slow contraction

Publikation: Beitrag in Fachzeitschrift › Artikel › Forschung › Peer-Review

Autorschaft

  • Anna Ijjas
  • Andrew P. Sullivan
  • Frans Pretorius
  • Paul J. Steinhardt

Organisationseinheiten

Externe Organisationen

  • Max-Planck-Institut für Gravitationsphysik (Albert-Einstein-Institut)
  • Princeton University
  • Friedrich-Schiller-Universität Jena

Details

OriginalspracheEnglisch
Aufsatznummer013
FachzeitschriftJournal of Cosmology and Astroparticle Physics
Jahrgang2021
Ausgabenummer6
PublikationsstatusVeröffentlicht - 8 Juni 2021

Abstract

We study the detailed process by which slow contraction smooths and flattens the universe using an improved numerical relativity code that accepts initial conditions with non-perturbative deviations from homogeneity and isotropy along two independent spatial directions. Contrary to common descriptions of the early universe, we find that the geometry first rapidly converges to an inhomogeneous, spatially-curved and anisotropic ultralocal state in which all spatial gradient contributions to the equations of motion decrease as an exponential in time to negligible values. This is followed by a second stage in which the geometry converges to a homogeneous, spatially flat and isotropic spacetime. In particular, the decay appears to follow the same history whether the entire spacetime or only parts of it are smoothed by the end of slow contraction.

ASJC Scopus Sachgebiete

Zitieren

Ultralocality and slow contraction. / Ijjas, Anna; Sullivan, Andrew P.; Pretorius, Frans et al.
in: Journal of Cosmology and Astroparticle Physics, Jahrgang 2021, Nr. 6, 013, 08.06.2021.

Publikation: Beitrag in Fachzeitschrift › Artikel › Forschung › Peer-Review

Ijjas, A., Sullivan, A. P., Pretorius, F., Steinhardt, P. J., & Cook, W. G. (2021). Ultralocality and slow contraction. Journal of Cosmology and Astroparticle Physics, 2021(6), Artikel 013. https://doi.org/10.48550/arXiv.2103.00584, https://doi.org/10.1088/1475-7516/2021/06/013
Ijjas A, Sullivan AP, Pretorius F, Steinhardt PJ, Cook WG. Ultralocality and slow contraction. Journal of Cosmology and Astroparticle Physics. 2021 Jun 8;2021(6):013. doi: 10.48550/arXiv.2103.00584, 10.1088/1475-7516/2021/06/013
Ijjas, Anna ; Sullivan, Andrew P. ; Pretorius, Frans et al. / Ultralocality and slow contraction. in: Journal of Cosmology and Astroparticle Physics. 2021 ; Jahrgang 2021, Nr. 6.
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