%0 Journal Article
%T Lattice simulations of non-minimally coupled scalar fields in the Jordan frame
%A Figueroa, D. G.
%A Florio, A.
%A Opferkuch, T.
%A Stefanek, B.
%J Scipost Physics
%D 2023
%V 15
%N 3
%I Scipost Foundation
%@ 2542-4653
%G English
%F Figueroa_etal2023
%O WOS:001065573600001
%O exported from refbase (https://references.ific.uv.es/refbase/show.php?record=5670), last updated on Thu, 28 Sep 2023 08:08:59 +0000
%X The presence of scalar fields with non-minimal gravitational interactions of the form & xi;|& phi;|2R may have important implications for the physics of the early universe. We propose a procedure to solve the dynamics of non-minimally coupled scalar fields directly in the Jordan frame, where the non-minimal couplings are maintained explicitly. Our algorithm can be applied to lattice simulations that include minimally coupled fields and an arbitrary number of non-minimally coupled scalars, with the expansion of the universe sourced by all fields present. This includes situations when the dynamics become fully inhomogeneous, fully non-linear (due to e.g. backreaction or mode rescattering effects), and/or when the expansion of the universe is dominated by non-minimally coupled species. As an example, we study geometric preheating with a non-minimally coupled scalar spectator field when the inflaton oscillates following the end of inflation.
%R 10.21468/SciPostPhys.15.3.077
%U https://arxiv.org/abs/2112.08388
%U https://doi.org/10.21468/SciPostPhys.15.3.077
%P 077-28pp