http://arxiv.org/abs/1910.12547
We study the robustness of single-field inflation against inhomogeneities. We derive a simple analytic criterion on the shape of the potential for successful inflation in the presence of inhomogeneities, and demonstrate its validity using full 3+1 dimensional numerical relativity simulations on several classes of popular models of single-field inflation. We find that models with convex potentials are more robust to inhomogeneities than those with concave potentials, and that concave potentials that vary on super-Planckian scales are significantly more robust than those that vary on sub-Planckian scales.
J. Aurrekoetxea, K. Clough, R. Flauger, et. al.
Tue, 29 Oct 19
24/78
Comments: 16 pages, 12 figures
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