Robustness of slow contraction to cosmic initial conditions
Robustness of slow contraction to cosmic initial conditions
复制标题
缓慢收缩对宇宙初始条件的鲁棒性
DOI:
10.1088/1475-7516/2020/08/030
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发表时间:
2020
影响因子:
6.4
通讯作者:
Davies, Elliot Y.
中科院分区:
文献类型:
--
作者:
Ijjas, Anna;Cook, William G.;Pretorius, Frans;Steinhardt, Paul J.;Davies, Elliot Y.
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.
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DOI:
--
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期刊:
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