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Robustness of slow contraction to cosmic initial conditions

Author(s): Ijjas, Anna; Cook, William G; Pretorius, Frans; Steinhardt, Paul J; Davies, Elliot Y

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Abstract: We present numerical relativity simulations of cosmological scenarios in which the universe is smoothed and flattened by undergoing a phase of slow contraction and test their sensitivity to a wide range of initial conditions. Our numerical scheme enables the variation of all freely specifiable physical quantities that characterize the initial spatial hypersurface, such as the initial shear and spatial curvature contributions as well as the initial field and velocity distributions of the scalar that drives the cosmological evolution. In particular, we include initial conditions that are far outside the perturbative regime of the well-known attractor scaling solution. We complement our numerical results by analytically performing a complete dynamical systems analysis and show that the two approaches yield consistent results.
Electronic Publication Date: 13-Aug-2020
Citation: Ijjas, Anna, Cook, William G, Pretorius, Frans, Steinhardt, Paul J, Davies, Elliot Y. (Robustness of slow contraction to cosmic initial conditions. Journal of Cosmology and Astroparticle Physics, 2020 (08), 030 - 030. doi:10.1088/1475-7516/2020/08/030
DOI: doi:10.1088/1475-7516/2020/08/030
EISSN: 1475-7516
Type of Material: Journal Article
Journal/Proceeding Title: Journal of Cosmology and Astroparticle Physics
Version: Author's manuscript

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