Improved DHOST Genesis
Mian Zhu, Yunlong Zheng
Abstract
A bstract 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.
Topics & Concepts
PhysicsTheoretical physicsScalar (mathematics)Invariant (physics)String theoryScalar potentialScalar fieldMathematical physicsPerturbation (astronomy)Scale invarianceSpectrum (functional analysis)Particle physicsString (physics)Classical mechanicsSpectral densityQuantum electrodynamicsBlack Holes and Theoretical PhysicsParticle physics theoretical and experimental studiesCosmology and Gravitation Theories