42 citations · 112 across the 8 of their papers we have counts for
9 papers
Breaking the axion abundance-isocurvature relation: Scale invariance and high-scale inflation
Mariaveronica De Angelis, Javier Rubio
A QCD axion accounting for dark matter through pre-inflationary misalignment is strongly constrained by CMB isocurvature bounds, which place the classic axion window in tension wit…
Revisiting the Matter Creation Process: Observational Constraints on Gravitationally Induced Dark Energy and the Hubble Tension
Tiziano Schiavone, Mariaveronica De Angelis, Luis A. Escamilla +2
The Hubble tension and the unknown origin of dark energy motivate the exploration of alternative mechanisms for late-time cosmic acceleration. We investigate gravitationally induce…
Modified gravity in the presence of matter creation: scenario for the late Universe
Giovanni Montani, Nakia Carlevaro, Mariaveronica De Angelis
We consider a dynamic scenario for characterizing the late Universe evolution, aiming to mitigate the Hubble tension. Specifically, we consider a metric gravity in the Jorda…
Testing scale-invariant inflation against cosmological data
Chiara Cecchini, Mariaveronica De Angelis, William Giarè +2
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-i…
Gravitational waves in a cyclic Universe: resilience through cycles and vacuum state
Mariaveronica De Angelis, Adam Smith, William Giarè +1
We present a generalised calculation for the spectrum of primordial tensor perturbations in a cyclic Universe, making no assumptions about the vacuum state of the theory and accoun…
Tracking the Multifield Dynamics with Cosmological Data: A Monte Carlo approach
William Giarè, Mariaveronica De Angelis, Carsten van de Bruck +1
We introduce a numerical method specifically designed for investigating generic multifield models of inflation where a number of scalar fields are minimally coupled to gravit…
Metric gravity with dynamical dark energy as a scenario for the Hubble tension
Giovanni Montani, Mariaveronica De Angelis, Flavio Bombacigno +1
We introduce a theoretical framework to interpret the Hubble tension, based on the combination of a metric gravity with a dynamical dark energy contribution. The modified gr…
Adiabatic and isocurvature perturbations in extended theories with kinetic couplings
Mariaveronica De Angelis, Carsten van de Bruck
The scalar field sector in low--energy effective field theories motivated by string theory often contains several scalar fields, some of which possess non--standard kinetic terms.…
On the emergence of a classical Isotropic Universe from a Quantum Bianchi Cosmology in the Jordan Frame
Mariaveronica De Angelis, Giovanni Montani
We demonstrate a spontaneous tendency of quantum wave packets to become quasi-classical, providing a classical limit for the Universe dynamics. However, this limit is not maintaine…