Early data from the James Webb Space Telescope (JWST) has uncovered the existence of a
surprisingly abundant population of very massive galaxies at extremely high redshift, which …

Early observations with the James Webb Space Telescope (JWST) have revealed the
existence of an unexpectedly large abundance of extremely massive galaxies at redshifts z≳ …

There is solid theoretical and observational motivation behind the idea of scale-invariance
as a fundamental symmetry of Nature. We consider a recently proposed classically scale …

The recently reported non-zero isotropic birefringence angle in Planck 2018 polarization
data provides a tantalizing hint for new physics of axions. In this paper, we explain this by a …

We study the process of the Primordial Black Holes (PBHs) production in the novel
framework, namely α-attractor Galileon inflation (G-inflation) model. In our framework, we …

We study rapid-turn trajectories in a class of two-field cosmological models, whose scalar
manifold is the Poincaré disk. Background solutions in multi-field inflation, with field-space …

We argue that field trajectories, which lead to cosmic acceleration and feature rapid turns
near the boundary of the moduli space, are in the Swampland. We obtain this result by …

The potential energy from a time-dependent scalar field provides a possible explanation for
the observed cosmic acceleration. In this paper, we investigate how data from supernova …

A popular proposal for resolving the Hubble tension involves an early phase of dark energy,
driven by an axion field with a periodic potential. In this paper, we argue that these models …

We show how a class of multi-field scalar-field theories in a Lorentz-breaking background
imposes consistency conditions on its effective theory of a single field and provides an …