The isotropy and homogeneity of the cosmic microwave background (CMB) favors “scalar
driven” early Universe inflationary models. However, gauge fields and other non-scalar …

A bstract In the Swampland philosophy of constraining EFTs from black hole mechanics we
study charged black hole evaporation in de Sitter space. We establish how the black hole …

We study how Abelian-gauge-field production during inflation affects scalar perturbations in
the case when the gauge field interacts with the inflaton directly (by means of generic kinetic …

The simplest gauge invariant models of inflationary magnetogenesis are known to suffer
from the problems of either large backreaction or strong coupling, which make it difficult to …

In all inflationary scenarios of primordial black hole (PBH) formation, amplified scalar
perturbations inevitably accompany an induced stochastic gravitational wave background …

A bstract We consider the presence of an axion like particle, σ, with a generic CP violating
axial coupling of the form (ασ/f)\(F\tilde {F}\), where F μν is the gauge field strength of a …

The bispectrum of primordial curvature perturbations in the squeezed configuration, in which
one wavenumber, k 3, is much smaller than the other two, k 3<< k 1≈ k 2, plays a special …

It is usually assumed that when Weyl invariance is unbroken in the electromagnetic sector,
the energy density of primordial magnetic fields will redshift as radiation. Here we show that …

Recent observational claims of magnetic fields stronger than 10− 16 G in the extragalactic
medium motivate a new look for their origin in the inflationary magnetogenesis models. In …

Inflationary models can correlate small-scale density perturbations with the long-wavelength
gravitational waves (GW) in the form of the Tensor-Scalar-Scalar (TSS) bispectrum. This …