This article is intended to review the recent developments in the Horndeski theory and its
generalization, which provide us with a systematic understanding of scalar–tensor theories …

We review the status of bouncing cosmologies as alternatives to cosmological inflation for
providing a description of the very early universe, and a source for the cosmological …

For primordial perturbations, deviations from Gaussian statistics on the tail of the probability
distribution can be associated with non-perturbative effects of inflation. In this paper, we …

This book lays out the scientific goals to be addressed by the next-generation ground-based
cosmic microwave background experiment, CMB-S4, envisioned to consist of dedicated …

This chapter provides a review of the frameworks developed for cosmological perturbation
theory in loop quantum cosmology and applications to various models of the early universe …

The goal of this contribution is to present the properties of a class of quantum bouncing
models in which the quantum bounce originates from the Dirac canonical quantization of a …

The phenomenology of primordial black hole (PBH) physics and the associated PBH
abundance constraints can be used to probe the physics of the early universe. In this work …

We investigate the bounce realization in the framework of DHOST cosmology, focusing on
the relation with observables. We perform a detailed analysis of the scalar and tensor …

We present a new class of nonsingular bounce cosmology free from instabilities, using a
single scalar field coupled to gravity within the framework of the Degenerate Higher-Order …

In this paper, we point out and study a generic type of signals existing in the primordial
universe models, which can be used to model-independently distinguish the inflation …