Abstract Euclid is a European Space Agency medium-class mission selected for launch in
2020 within the cosmic vision 2015–2025 program. The main goal of Euclid is to understand …

I argue that cosmological data from the epoch of primordial inflation is catalyzing the
maturation of quantum gravity from speculation into a hard science. I explain why quantum …

We present the first quantum field theory model of inflation that is renormalizable in the
matter sector, with a super-Hubble inflaton mass and sub-Planckian field excursions, which …

Adiabatic subtraction is a popular method of renormalization of observables in quantum field
theories on a curved spacetime. When applied to the computation of the power spectra of …

We develop a new regularization method for the stress-energy tensor and the two-point
function of free quantum scalar fields propagating in cosmological spacetimes. We proceed …

Our work highlights the crucial role played by the equation of state (EoS) parameter $ w $
within the context of single field inflation with Multiple Sharp Transitions (MSTs) to untangle …

We reexamine the regularization of the two-point function of a scalar field in a Friedmann-
Lemaitre-Robertson-Walker (FLRW) spacetime. Adiabatic regularization provides a set of …

High-frequency primordial gravitational waves (PGWs) with wave numbers larger than the
Hubble parameter at the end of inflation are originated from the ultraviolet (UV) modes …

In this paper, we review in detail different mechanisms of generation of large primordial
fluctuations and their implications for the production of primordial black holes (PBHs) and …

We calculate, in the free Maxwell theory, the renormalized quantum vacuum expectation
value of the two-point magnetic correlation function in de Sitter inflation. We find that …