I review and discuss the possible implications for inflation resulting from considering new
physics in light of the Hubble tension. My study is motivated by a simple argument that the …

In inflationary models that produce a spike of power on short scales, back-reaction of small-
scale substructure onto large-scale modes is enhanced. Loop corrections that quantify this …

Recently multi-field inflation models that can produce large scalar fluctuations on small
scales have drawn a lot of attention, primarily because they could lead to primordial black …

Cosmological α-attractors stand out as particularly compelling models to describe inflation in
the very early universe, naturally meeting tight observational bounds from cosmic microwave …

The time evolution of primordial fluctuations conceals a wealth of insights into the high-
energy physics at play during the earliest moments of our Universe, which is ultimately …

We study the formation of primordial black holes and the generation of gravitational waves in
a class of cosmological models that are direct supersymmetric analogs of the …

Ultralight dark matter (ULDM) is usually taken to be a single scalar field. Here we explore the
possibility that ULDM consists of N light scalar fields with only gravitational interactions. This …

Heavy scalar fields can undergo an instability during inflation as a result of their kinetic
couplings with the inflaton. This is known as the geometrical destabilization of inflation, as it …

The modified supergravity approach is applied to describe a formation of Primordial Black
Holes (PBHs) after Starobinsky inflation. Our approach naturally leads to the two-(scalar) …

This study investigates the realization of R-symmetric Higgs inflation within the framework of
no-scale-like supergravity, aiming to elucidate the formation of primordial black holes and …