Abstract
We improve the DHOST Genesis proposed in [1], such that the near scale invariant scalar power spectrum can be generated from the model itself, without invoking extra mechanism like a string gas. Besides, the superluminality problem of scalar perturbation plagued in [1] can be rescued by choosing proper DHOST action.
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Zhu, M., Zheng, Y. Improved DHOST Genesis. J. High Energ. Phys. 2021, 163 (2021). https://doi.org/10.1007/JHEP11(2021)163
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DOI: https://doi.org/10.1007/JHEP11(2021)163