Improved DHOST Genesis

Abstract

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.

Keywords

• Classical Theories of Gravity
• Cosmology of Theories beyond the SM