My research focusses on the foundational aspects of cosmology, such as the nature of dark matter, dark energy, gravity and inflation. I mainly work on testing cosmological models with experiments and observational data, such as from—but not only—weak lensing and galaxy clustering surveys. My current effort aims at finding novel observables or combinations of known observables to exploit the large-scale structure information at its best. At the moment, I pursue three different projects with this multi-wavelength, synergistic approach:
The cross-correlation between gamma-ray anisotropies and direct gravitational probes of dark matter (e.g. clustering or lensing), to detect dark matter particles.
The multi-tracer technique, to overcome cosmic variance and detect primordial non-Gaussianity and relativistic effects on scales near and beyond the cosmological horizon.
The use of radio cosmic shear in combination with traditional optical/near-IR weak lensing, to mitigate systematic effects and the spurious contamination from intrinsic alignments.