Research

Most of the observable consequences of Dark Energy follow from its impact on the late-time expansion of the universe. I am developing advanced model-independent methods to test the expansion and growth history of the universe with the incredibly large sets of upcoming data from ongoing and future GW and multi-messenger surveys. Aiming at tracing back the observed phenomenology to the fundamental Dark Energy properties.

I have been studying several scenarios potentially capable to fit cosmological data as well as the standard ΛCDM model, while simultaneously resolving the existing — within ΛCDM — tensions with local observations.
I have been focusing on Self-Interacting Sterile Neutrinos, Early Dark Energy, Decaying Dark Matter, Dark Matter-Dark Energy & Dark Matter-Dark Radiation interaction scenarios.

I am actively studying both theoretically and observationally on the intriguing topic of cosmological coupling of black holes, aiming at the shedding light on their (singular vs nonsingular) nature. Moreover, in the past I established stringent limits on the mass and abundance of Primordial Black Holes (PBHs), competitive with CMB bounds from Planck, for both monochromatic and extended PBH mass distributions. 

I devised a new, flexible technique to get robust limits from structure formation data on departures from the ΛCDM predictions at (sub)galactic scales, without the need of running expensive N-body simulations.
I have been applying the new method to various viable non-standard particle Dark Matter models, such as Warm Dark Matter & Fuzzy Dark Matter.

Since it is impossible to disentangle the microscopic Dark Matter features from its macroscopic distribution, I have been working on extracting bounds on Early Universe Cosmology by using the Inter-Galactic Medium, through the Lyman-α forest, as a tracer of the underlying Dark Matter distribution, in the context of Ultra-Light Scalar Dark Matter and Early Matter Domination scenarios.

Large-Scale Structure (LSS) surveys will soon require to go beyond current semi-analytic approximations to predict non-linear gravitational clustering. I have been working on comparing predictions from these standard algorithms with the outputs from N-body simulations and Effective Field Theory of LSS,  in the context of Early Dark Energy & alternative inflationary models,