http://arxiv.org/abs/2109.05277
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.
M. Zhu and Y. Zheng
Tue, 14 Sep 21
73/88
Comments: 7 pages, 3 figures, comments are welcome
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