Improved DHOST Genesis
arXiv:2109.05277 · doi:10.1007/JHEP11(2021)163
Abstract
We improve the DHOST Genesis proposed in \cite{Ilyas:2020zcb}, such that the near scale invariant scalar power spectrum can be generated from the model itself, without involking extra mechanism like a string gas. Besides, the superluminality problem of scalar perturbation plagued in \cite{Ilyas:2020zcb} can be rescued by choosing proper DHOST action.
arXiv comment7 pages, 3 figures, version accepted for publication in JHEP
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