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- W4382491978 abstract "Loops of inflationary gravitons are known to induce large temporal and spatial logarithms which can cause perturbation theory to break down. Nonlinear sigma models possess the same kind of derivative interactions and induce the same sorts of large logarithms, without the complicated index structure and potential gauge problem. Previous studies have examined models with zero field space curvature which can be reduced to free field theories by local, invertible field redefinitions. Here we study a model which cannot be so reduced and still shows the same sorts of large logarithms. We compute the evolution of the background at 1-loop and 2-loop orders, and we find the 1-loop $beta$ and $gamma$ functions." @default.
- W4382491978 created "2023-06-29" @default.
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- W4382491978 date "2023-06-27" @default.
- W4382491978 modified "2023-09-27" @default.
- W4382491978 title "Large Inflationary Logarithms in a Nontrivial Nonlinear Sigma Model" @default.
- W4382491978 doi "https://doi.org/10.1103/physrevd.108.065001" @default.
- W4382491978 hasPublicationYear "2023" @default.
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